20675412 has 72 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 6785856.

The previous prime is 20675399. The next prime is 20675423. The reversal of 20675412 is 21457602.

It is a super-2 number, since 2×20675412² = 854945322739488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86389 + ... + 86627.

It is an arithmetic number, because the mean of its divisors is an integer number (764400).

Almost surely, 2^20675412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20675412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518400).

20675412 is an abundant number, since it is smaller than the sum of its proper divisors (34361388).

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

20675412 is a wasteful number, since it uses less digits than its factorization.

20675412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20675412 is about 4547.0223223556. The cubic root of 20675412 is about 274.4635802259.

The spelling of 20675412 in words is "twenty million, six hundred seventy-five thousand, four hundred twelve".