20744970 has 16 divisors (see below), whose sum is σ = 49788000. Its totient is φ = 5531984.

The previous prime is 20744957. The next prime is 20744987. The reversal of 20744970 is 7944702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345720 + ... + 345779.

It is an arithmetic number, because the mean of its divisors is an integer number (3111750).

Almost surely, 2^20744970 is an apocalyptic number.

20744970 is an abundant number, since it is smaller than the sum of its proper divisors (29043030).

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

20744970 is a wasteful number, since it uses less digits than its factorization.

20744970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691509.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20744970 is about 4554.6646418809. The cubic root of 20744970 is about 274.7710270342.

The spelling of 20744970 in words is "twenty million, seven hundred forty-four thousand, nine hundred seventy".