19972694 has 24 divisors (see below), whose sum is σ = 36369648. Its totient is φ = 8186640.

The previous prime is 19972691. The next prime is 19972703. The reversal of 19972694 is 49627991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2177 + ... + 6684.

It is an arithmetic number, because the mean of its divisors is an integer number (1515402).

Almost surely, 2^19972694 is an apocalyptic number.

19972694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19972694 is a deficient number, since it is larger than the sum of its proper divisors (16396954).

19972694 is a wasteful number, since it uses less digits than its factorization.

19972694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8900 (or 8893 counting only the distinct ones).

The product of its digits is 244944, while the sum is 47.

The square root of 19972694 is about 4469.0820086456. The cubic root of 19972694 is about 271.3181722511.

The spelling of 19972694 in words is "nineteen million, nine hundred seventy-two thousand, six hundred ninety-four".