19995975090 has 160 divisors (see below), whose sum is σ = 66174958080. Its totient is φ = 4218915456.

The previous prime is 19995975031. The next prime is 19995975101. The reversal of 19995975090 is 9057959991.

It is a super-3 number, since 3×19995975090³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 61930 + ... + 209349.

It is an arithmetic number, because the mean of its divisors is an integer number (413593488).

Almost surely, 2^19995975090 is an apocalyptic number.

19995975090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19995975090 is an abundant number, since it is smaller than the sum of its proper divisors (46178982990).

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

19995975090 is a wasteful number, since it uses less digits than its factorization.

19995975090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271318 (or 271309 counting only the distinct ones).

The product of its (nonzero) digits is 10333575, while the sum is 63.

The spelling of 19995975090 in words is "nineteen billion, nine hundred ninety-five million, nine hundred seventy-five thousand, ninety".