20119778520 has 32 divisors (see below), whose sum is σ = 60359335920. Its totient is φ = 5365274240.

The previous prime is 20119778519. The next prime is 20119778521. The reversal of 20119778520 is 2587791102.

It is an interprime number because it is at equal distance from previous prime (20119778519) and next prime (20119778521).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20119778521) 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, 83832291 + ... + 83832530.

Almost surely, 2^20119778520 is an apocalyptic number.

20119778520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20119778520 is an abundant number, since it is smaller than the sum of its proper divisors (40239557400).

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

20119778520 is a wasteful number, since it uses less digits than its factorization.

20119778520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167664835 (or 167664831 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The spelling of 20119778520 in words is "twenty billion, one hundred nineteen million, seven hundred seventy-eight thousand, five hundred twenty".