20572680 has 32 divisors (see below), whose sum is σ = 61718400. Its totient is φ = 5486016.

The previous prime is 20572663. The next prime is 20572691. The reversal of 20572680 is 8627502.

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

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, 85600 + ... + 85839.

It is an arithmetic number, because the mean of its divisors is an integer number (1928700).

Almost surely, 2^20572680 is an apocalyptic number.

20572680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20572680 is an abundant number, since it is smaller than the sum of its proper divisors (41145720).

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

20572680 is a wasteful number, since it uses less digits than its factorization.

20572680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171453 (or 171449 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20572680 is about 4535.7116310453. The cubic root of 20572680 is about 274.0082402907.

The spelling of 20572680 in words is "twenty million, five hundred seventy-two thousand, six hundred eighty".