20621892 has 24 divisors (see below), whose sum is σ = 50210496. Its totient is φ = 6575008.

The previous prime is 20621891. The next prime is 20621903. The reversal of 20621892 is 29812602.

It is not an unprimeable number, because it can be changed into a prime (20621891) by changing a digit.

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, 37083 + ... + 37634.

It is an arithmetic number, because the mean of its divisors is an integer number (2092104).

Almost surely, 2^20621892 is an apocalyptic number.

It is an amenable number.

20621892 is an abundant number, since it is smaller than the sum of its proper divisors (29588604).

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

20621892 is a wasteful number, since it uses less digits than its factorization.

20621892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74747 (or 74745 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20621892 is about 4541.1333387162. The cubic root of 20621892 is about 274.2265517549.

The spelling of 20621892 in words is "twenty million, six hundred twenty-one thousand, eight hundred ninety-two".