19713970 has 16 divisors (see below), whose sum is σ = 36444888. Its totient is φ = 7672320.

The previous prime is 19713961. The next prime is 19714003. The reversal of 19713970 is 7931791.

It can be written as a sum of positive squares in 4 ways, for example, as 18809569 + 904401 = 4337^2 + 951^2 .

It is a super-2 number, since 2×19713970² = 777281226321800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26271 + ... + 27010.

Almost surely, 2^19713970 is an apocalyptic number.

19713970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19713970 is a deficient number, since it is larger than the sum of its proper divisors (16730918).

19713970 is a wasteful number, since it uses less digits than its factorization.

19713970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53325.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 19713970 is about 4440.0416664712. The cubic root of 19713970 is about 270.1415353043.

The spelling of 19713970 in words is "nineteen million, seven hundred thirteen thousand, nine hundred seventy".