20494560 has 48 divisors (see below), whose sum is σ = 64559376. Its totient is φ = 5465088.

The previous prime is 20494553. The next prime is 20494601. The reversal of 20494560 is 6549402.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20869 + ... + 21828.

It is an arithmetic number, because the mean of its divisors is an integer number (1344987).

Almost surely, 2^20494560 is an apocalyptic number.

20494560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20494560 is an abundant number, since it is smaller than the sum of its proper divisors (44064816).

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

20494560 is a wasteful number, since it uses less digits than its factorization.

20494560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42715 (or 42707 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20494560 is about 4527.0917817071. The cubic root of 20494560 is about 273.6609726974.

The spelling of 20494560 in words is "twenty million, four hundred ninety-four thousand, five hundred sixty".