20256572 has 24 divisors (see below), whose sum is σ = 40704384. Its totient is φ = 8640432.

The previous prime is 20256559. The next prime is 20256581. The reversal of 20256572 is 27565202.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4763 + ... + 7949.

It is an arithmetic number, because the mean of its divisors is an integer number (1696016).

Almost surely, 2^20256572 is an apocalyptic number.

It is an amenable number.

20256572 is an abundant number, since it is smaller than the sum of its proper divisors (20447812).

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

20256572 is a wasteful number, since it uses less digits than its factorization.

20256572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425 (or 3423 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20256572 is about 4500.7301629847. The cubic root of 20256572 is about 272.5975724430.

The spelling of 20256572 in words is "twenty million, two hundred fifty-six thousand, five hundred seventy-two".