20912136 has 32 divisors (see below), whose sum is σ = 59749440. Its totient is φ = 5974848.

The previous prime is 20912123. The next prime is 20912149. The reversal of 20912136 is 63121902.

It is an interprime number because it is at equal distance from previous prime (20912123) and next prime (20912149).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 62071 + ... + 62406.

It is an arithmetic number, because the mean of its divisors is an integer number (1867170).

Almost surely, 2^20912136 is an apocalyptic number.

It is an amenable number.

20912136 is an abundant number, since it is smaller than the sum of its proper divisors (38837304).

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

20912136 is a wasteful number, since it uses less digits than its factorization.

20912136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124493 (or 124489 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 20912136 is about 4572.9788978302. The cubic root of 20912136 is about 275.5071017918.

The spelling of 20912136 in words is "twenty million, nine hundred twelve thousand, one hundred thirty-six".