19906519392 has 48 divisors (see below), whose sum is σ = 58060684080. Its totient is φ = 6635506176.

The previous prime is 19906519319. The next prime is 19906519417. The reversal of 19906519392 is 29391560991.

19906519392 is a `hidden beast` number, since 1 + 9 + 90 + 6 + 519 + 39 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11519113 + ... + 11520840.

It is an arithmetic number, because the mean of its divisors is an integer number (1209597585).

Almost surely, 2^19906519392 is an apocalyptic number.

19906519392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19906519392 is an abundant number, since it is smaller than the sum of its proper divisors (38154164688).

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

19906519392 is a wasteful number, since it uses less digits than its factorization.

19906519392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23039972 (or 23039958 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The spelling of 19906519392 in words is "nineteen billion, nine hundred six million, five hundred nineteen thousand, three hundred ninety-two".