20662988 has 24 divisors (see below), whose sum is σ = 37868544. Its totient is φ = 9853200.

The previous prime is 20662979. The next prime is 20663009. The reversal of 20662988 is 88926602.

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, 7631 + ... + 9977.

It is an arithmetic number, because the mean of its divisors is an integer number (1577856).

Almost surely, 2^20662988 is an apocalyptic number.

It is an amenable number.

20662988 is a deficient number, since it is larger than the sum of its proper divisors (17205556).

20662988 is a wasteful number, since it uses less digits than its factorization.

20662988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453 (or 2451 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20662988 is about 4545.6559482653. The cubic root of 20662988 is about 274.4085935141.

The spelling of 20662988 in words is "twenty million, six hundred sixty-two thousand, nine hundred eighty-eight".