19621040016 has 40 divisors (see below), whose sum is σ = 50967751744. Its totient is φ = 6504209280.

The previous prime is 19621040003. The next prime is 19621040041. The reversal of 19621040016 is 61004012691.

It is a happy number.

It is a super-2 number, since 2×19621040016² (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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120516 + ... + 1137891.

Almost surely, 2^19621040016 is an apocalyptic number.

19621040016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19621040016 is an abundant number, since it is smaller than the sum of its proper divisors (31346711728).

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

19621040016 is a wasteful number, since it uses less digits than its factorization.

19621040016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258599 (or 2258593 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 19621040016 in words is "nineteen billion, six hundred twenty-one million, forty thousand, sixteen".