20700438 has 24 divisors (see below), whose sum is σ = 45508344. Its totient is φ = 6272640.

The previous prime is 20700413. The next prime is 20700451. The reversal of 20700438 is 83400702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13531 + ... + 14982.

It is an arithmetic number, because the mean of its divisors is an integer number (1896181).

Almost surely, 2^20700438 is an apocalyptic number.

20700438 is an abundant number, since it is smaller than the sum of its proper divisors (24807906).

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

20700438 is a wasteful number, since it uses less digits than its factorization.

20700438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28540 (or 28529 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20700438 is about 4549.7734009509. The cubic root of 20700438 is about 274.5742746112.

The spelling of 20700438 in words is "twenty million, seven hundred thousand, four hundred thirty-eight".