20613916 has 12 divisors (see below), whose sum is σ = 36314320. Its totient is φ = 10238400.

The previous prime is 20613907. The next prime is 20613941. The reversal of 20613916 is 61931602.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 16461 + ... + 17668.

Almost surely, 2^20613916 is an apocalyptic number.

It is an amenable number.

20613916 is a deficient number, since it is larger than the sum of its proper divisors (15700404).

20613916 is a wasteful number, since it uses less digits than its factorization.

20613916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34284 (or 34282 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 20613916 is about 4540.2550589146. The cubic root of 20613916 is about 274.1911926807.

The spelling of 20613916 in words is "twenty million, six hundred thirteen thousand, nine hundred sixteen".