20415612 has 48 divisors (see below), whose sum is σ = 54673920. Its totient is φ = 5808192.

The previous prime is 20415611. The next prime is 20415613. The reversal of 20415612 is 21651402.

It is an interprime number because it is at equal distance from previous prime (20415611) and next prime (20415613).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29818 + ... + 30494.

It is an arithmetic number, because the mean of its divisors is an integer number (1139040).

Almost surely, 2^20415612 is an apocalyptic number.

It is an amenable number.

20415612 is an abundant number, since it is smaller than the sum of its proper divisors (34258308).

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

20415612 is a wasteful number, since it uses less digits than its factorization.

20415612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20415612 is about 4518.3638631699. The cubic root of 20415612 is about 273.3091266817.

The spelling of 20415612 in words is "twenty million, four hundred fifteen thousand, six hundred twelve".