19992223040 has 56 divisors (see below), whose sum is σ = 50406876072. Its totient is φ = 7526481920.

The previous prime is 19992223039. The next prime is 19992223067. The reversal of 19992223040 is 4032229991.

It can be written as a sum of positive squares in 4 ways, for example, as 7566216256 + 12426006784 = 86984^2 + 111472^2 .

It is a super-2 number, since 2×19992223040² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 1832081 + ... + 1842960.

It is an arithmetic number, because the mean of its divisors is an integer number (900122787).

Almost surely, 2^19992223040 is an apocalyptic number.

19992223040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19992223040 is an abundant number, since it is smaller than the sum of its proper divisors (30414653032).

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

19992223040 is a wasteful number, since it uses less digits than its factorization.

19992223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675075 (or 3675065 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 19992223040 in words is "nineteen billion, nine hundred ninety-two million, two hundred twenty-three thousand, forty".