20615912 has 32 divisors (see below), whose sum is σ = 42465600. Its totient is φ = 9339264.

The previous prime is 20615911. The next prime is 20615923. The reversal of 20615912 is 21951602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (1327050).

Almost surely, 2^20615912 is an apocalyptic number.

It is an amenable number.

20615912 is an abundant number, since it is smaller than the sum of its proper divisors (21849688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20615912 is a wasteful number, since it uses less digits than its factorization.

20615912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945 (or 5941 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 20615912 is about 4540.4748650334. The cubic root of 20615912 is about 274.2000421712.

The spelling of 20615912 in words is "twenty million, six hundred fifteen thousand, nine hundred twelve".