20932490 has 48 divisors (see below), whose sum is σ = 41389920. Its totient is φ = 7600320.

The previous prime is 20932489. The next prime is 20932493. The reversal of 20932490 is 9423902.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (20932493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159725 + ... + 159855.

It is an arithmetic number, because the mean of its divisors is an integer number (862290).

Almost surely, 2^20932490 is an apocalyptic number.

20932490 is a deficient number, since it is larger than the sum of its proper divisors (20457430).

20932490 is a wasteful number, since it uses less digits than its factorization.

20932490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20932490 is about 4575.2038205964. The cubic root of 20932490 is about 275.5964574527.

The spelling of 20932490 in words is "twenty million, nine hundred thirty-two thousand, four hundred ninety".