19870872938 has 16 divisors (see below), whose sum is σ = 34090568064. Its totient is φ = 8509534800.

The previous prime is 19870872937. The next prime is 19870872941. The reversal of 19870872938 is 83927807891.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19870872937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527270 + ... + 563697.

It is an arithmetic number, because the mean of its divisors is an integer number (2130660504).

Almost surely, 2^19870872938 is an apocalyptic number.

19870872938 is a deficient number, since it is larger than the sum of its proper divisors (14219695126).

19870872938 is a wasteful number, since it uses less digits than its factorization.

19870872938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092277.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 19870872938 in words is "nineteen billion, eight hundred seventy million, eight hundred seventy-two thousand, nine hundred thirty-eight".