20870412 has 12 divisors (see below), whose sum is σ = 48697656. Its totient is φ = 6956800.

The previous prime is 20870389. The next prime is 20870429. The reversal of 20870412 is 21407802.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 869589 + ... + 869612.

It is an arithmetic number, because the mean of its divisors is an integer number (4058138).

Almost surely, 2^20870412 is an apocalyptic number.

It is an amenable number.

20870412 is an abundant number, since it is smaller than the sum of its proper divisors (27827244).

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

20870412 is a wasteful number, since it uses less digits than its factorization.

20870412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739208 (or 1739206 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20870412 is about 4568.4146046523. The cubic root of 20870412 is about 275.3237487389.

The spelling of 20870412 in words is "twenty million, eight hundred seventy thousand, four hundred twelve".