20119115856 has 80 divisors (see below), whose sum is σ = 61004718464. Its totient is φ = 5592955392.

The previous prime is 20119115813. The next prime is 20119115873. The reversal of 20119115856 is 65851191102.

It is a happy number.

It is a super-2 number, since 2×20119115856² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 796735 + ... + 821598.

Almost surely, 2^20119115856 is an apocalyptic number.

It is an amenable number.

20119115856 is an abundant number, since it is smaller than the sum of its proper divisors (40885602608).

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

20119115856 is a wasteful number, since it uses less digits than its factorization.

20119115856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618388 (or 1618382 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 20119115856 in words is "twenty billion, one hundred nineteen million, one hundred fifteen thousand, eight hundred fifty-six".