19797966 has 32 divisors (see below), whose sum is σ = 44215200. Its totient is φ = 6566400.

The previous prime is 19797959. The next prime is 19797983. The reversal of 19797966 is 66979791.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11566 + ... + 13166.

It is an arithmetic number, because the mean of its divisors is an integer number (1381725).

Almost surely, 2^19797966 is an apocalyptic number.

19797966 is an abundant number, since it is smaller than the sum of its proper divisors (24417234).

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

19797966 is a wasteful number, since it uses less digits than its factorization.

19797966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1835 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 19797966 is about 4449.4905326340. The cubic root of 19797966 is about 270.5246588449.

The spelling of 19797966 in words is "nineteen million, seven hundred ninety-seven thousand, nine hundred sixty-six".