20345676 has 48 divisors (see below), whose sum is σ = 52388448. Its totient is φ = 6105600.

The previous prime is 20345669. The next prime is 20345681. The reversal of 20345676 is 67654302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4806 + ... + 7986.

It is an arithmetic number, because the mean of its divisors is an integer number (1091426).

Almost surely, 2^20345676 is an apocalyptic number.

20345676 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20345676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26194224).

20345676 is an abundant number, since it is smaller than the sum of its proper divisors (32042772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20345676 is a wasteful number, since it uses less digits than its factorization.

20345676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3240 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20345676 is about 4510.6181394572. The cubic root of 20345676 is about 272.9966858136.

Adding to 20345676 its reverse (67654302), we get a palindrome (87999978).

It can be divided in two parts, 20 and 345676, that added together give a triangular number (345696 = T₈₃₁).

The spelling of 20345676 in words is "twenty million, three hundred forty-five thousand, six hundred seventy-six".