19972612 has 12 divisors (see below), whose sum is σ = 38129616. Its totient is φ = 9078440.

The previous prime is 19972567. The next prime is 19972613. The reversal of 19972612 is 21627991.

It is not an unprimeable number, because it can be changed into a prime (19972613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226918 + ... + 227005.

It is an arithmetic number, because the mean of its divisors is an integer number (3177468).

Almost surely, 2^19972612 is an apocalyptic number.

It is an amenable number.

19972612 is a deficient number, since it is larger than the sum of its proper divisors (18157004).

19972612 is a wasteful number, since it uses less digits than its factorization.

19972612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453938 (or 453936 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 19972612 is about 4469.0728344926. The cubic root of 19972612 is about 271.3178009422.

The spelling of 19972612 in words is "nineteen million, nine hundred seventy-two thousand, six hundred twelve".