19961612 has 18 divisors (see below), whose sum is σ = 38398164. Its totient is φ = 9073240.

The previous prime is 19961603. The next prime is 19961633. The reversal of 19961612 is 21616991.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20138 + ... + 21105.

Almost surely, 2^19961612 is an apocalyptic number.

It is an amenable number.

19961612 is a deficient number, since it is larger than the sum of its proper divisors (18436552).

19961612 is a wasteful number, since it uses less digits than its factorization.

19961612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41269 (or 41256 counting only the distinct ones).

The product of its digits is 5832, while the sum is 35.

The square root of 19961612 is about 4467.8419846722. The cubic root of 19961612 is about 271.2679819887.

The spelling of 19961612 in words is "nineteen million, nine hundred sixty-one thousand, six hundred twelve".