19979539062 has 16 divisors (see below), whose sum is σ = 45667517952. Its totient is φ = 5708439720.

The previous prime is 19979539061. The next prime is 19979539079. The reversal of 19979539062 is 26093597991.

It is a super-2 number, since 2×19979539062² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19979538987 and 19979539005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19979539061) 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, 237851614 + ... + 237851697.

It is an arithmetic number, because the mean of its divisors is an integer number (2854219872).

Almost surely, 2^19979539062 is an apocalyptic number.

19979539062 is an abundant number, since it is smaller than the sum of its proper divisors (25687978890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19979539062 is a wasteful number, since it uses less digits than its factorization.

19979539062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475703323.

The product of its (nonzero) digits is 8266860, while the sum is 60.

The spelling of 19979539062 in words is "nineteen billion, nine hundred seventy-nine million, five hundred thirty-nine thousand, sixty-two".