20869516 has 6 divisors (see below), whose sum is σ = 36521660. Its totient is φ = 10434756.

The previous prime is 20869507. The next prime is 20869547. The reversal of 20869516 is 61596802.

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 as a sum of consecutive naturals, namely, 2608686 + ... + 2608693.

Almost surely, 2^20869516 is an apocalyptic number.

It is an amenable number.

20869516 is a deficient number, since it is larger than the sum of its proper divisors (15652144).

20869516 is a wasteful number, since it uses less digits than its factorization.

20869516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217383 (or 5217381 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20869516 is about 4568.3165389452. The cubic root of 20869516 is about 275.3198086536.

The spelling of 20869516 in words is "twenty million, eight hundred sixty-nine thousand, five hundred sixteen".