19935970 has 16 divisors (see below), whose sum is σ = 36855288. Its totient is φ = 7758720.

The previous prime is 19935931. The next prime is 19935983. The reversal of 19935970 is 7953991.

It can be written as a sum of positive squares in 4 ways, for example, as 19000881 + 935089 = 4359^2 + 967^2 .

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, 26571 + ... + 27310.

Almost surely, 2^19935970 is an apocalyptic number.

19935970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19935970 is a deficient number, since it is larger than the sum of its proper divisors (16919318).

19935970 is a wasteful number, since it uses less digits than its factorization.

19935970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53925.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 19935970 is about 4464.9714444776. The cubic root of 19935970 is about 271.1517783785.

The spelling of 19935970 in words is "nineteen million, nine hundred thirty-five thousand, nine hundred seventy".