19939764 has 24 divisors (see below), whose sum is σ = 50105440. Its totient is φ = 6135264.

The previous prime is 19939763. The next prime is 19939769. The reversal of 19939764 is 46793991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19939763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63754 + ... + 64065.

Almost surely, 2^19939764 is an apocalyptic number.

It is an amenable number.

19939764 is an abundant number, since it is smaller than the sum of its proper divisors (30165676).

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

19939764 is a wasteful number, since it uses less digits than its factorization.

19939764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127839 (or 127837 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The square root of 19939764 is about 4465.3962870052. The cubic root of 19939764 is about 271.1689781869.

The spelling of 19939764 in words is "nineteen million, nine hundred thirty-nine thousand, seven hundred sixty-four".