20990696 has 16 divisors (see below), whose sum is σ = 39481440. Its totient is φ = 10462320.

The previous prime is 20990677. The next prime is 20990707. The reversal of 20990696 is 69609902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (2467590).

Almost surely, 2^20990696 is an apocalyptic number.

It is an amenable number.

20990696 is a deficient number, since it is larger than the sum of its proper divisors (18490744).

20990696 is a wasteful number, since it uses less digits than its factorization.

20990696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264 (or 8260 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 20990696 is about 4581.5604328656. The cubic root of 20990696 is about 275.8516671265.

The spelling of 20990696 in words is "twenty million, nine hundred ninety thousand, six hundred ninety-six".