20501996 has 24 divisors (see below), whose sum is σ = 37314480. Its totient is φ = 9847872.

The previous prime is 20501989. The next prime is 20502019. The reversal of 20501996 is 69910502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11450 + ... + 13118.

It is an arithmetic number, because the mean of its divisors is an integer number (1554770).

Almost surely, 2^20501996 is an apocalyptic number.

It is an amenable number.

20501996 is a deficient number, since it is larger than the sum of its proper divisors (16812484).

20501996 is a wasteful number, since it uses less digits than its factorization.

20501996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793 (or 1791 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 20501996 is about 4527.9129850296. The cubic root of 20501996 is about 273.6940659822.

The spelling of 20501996 in words is "twenty million, five hundred one thousand, nine hundred ninety-six".