20461356 has 96 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 6398784.

The previous prime is 20461349. The next prime is 20461373. The reversal of 20461356 is 65316402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147135 + ... + 147273.

It is an arithmetic number, because the mean of its divisors is an integer number (588000).

Almost surely, 2^20461356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20461356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224000).

20461356 is an abundant number, since it is smaller than the sum of its proper divisors (35986644).

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

20461356 is a wasteful number, since it uses less digits than its factorization.

20461356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20461356 is about 4523.4230401323. The cubic root of 20461356 is about 273.5131033675.

Adding to 20461356 its reverse (65316402), we get a palindrome (85777758).

The spelling of 20461356 in words is "twenty million, four hundred sixty-one thousand, three hundred fifty-six".