19992651492 has 48 divisors (see below), whose sum is σ = 51195174912. Its totient is φ = 6022094880.

The previous prime is 19992651463. The next prime is 19992651509. The reversal of 19992651492 is 29415629991.

It is a super-2 number, since 2×19992651492² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431428 + ... + 475515.

It is an arithmetic number, because the mean of its divisors is an integer number (1066566144).

Almost surely, 2^19992651492 is an apocalyptic number.

19992651492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19992651492 is an abundant number, since it is smaller than the sum of its proper divisors (31202523420).

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

19992651492 is a wasteful number, since it uses less digits than its factorization.

19992651492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907128 (or 907126 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 57.

The spelling of 19992651492 in words is "nineteen billion, nine hundred ninety-two million, six hundred fifty-one thousand, four hundred ninety-two".