20951056 has 40 divisors (see below), whose sum is σ = 46625984. Its totient is φ = 8933760.

The previous prime is 20951027. The next prime is 20951083. The reversal of 20951056 is 65015902.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 31366 + ... + 32026.

Almost surely, 2^20951056 is an apocalyptic number.

It is an amenable number.

20951056 is an abundant number, since it is smaller than the sum of its proper divisors (25674928).

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

20951056 is a wasteful number, since it uses less digits than its factorization.

20951056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 20951056 is about 4577.2323515417. The cubic root of 20951056 is about 275.6779131518.

Adding to 20951056 its reverse (65015902), we get a palindrome (85966958).

The spelling of 20951056 in words is "twenty million, nine hundred fifty-one thousand, fifty-six".