19972037231278 has 32 divisors (see below), whose sum is σ = 32750012171520. Its totient is φ = 9059175773760.

The previous prime is 19972037231273. The next prime is 19972037231309. The reversal of 19972037231278 is 87213273027991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972037231273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108210738 + ... + 108395146.

It is an arithmetic number, because the mean of its divisors is an integer number (1023437880360).

Almost surely, 2^{19972037231278} is an apocalyptic number.

19972037231278 is a deficient number, since it is larger than the sum of its proper divisors (12777974940242).

19972037231278 is a wasteful number, since it uses less digits than its factorization.

19972037231278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194712.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 19972037231278 in words is "nineteen trillion, nine hundred seventy-two billion, thirty-seven million, two hundred thirty-one thousand, two hundred seventy-eight".