19953263990 has 16 divisors (see below), whose sum is σ = 39180954960. Its totient is φ = 7255732320.

The previous prime is 19953263989. The next prime is 19953264007. The reversal of 19953263990 is 9936235991.

It is a Curzon number.

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, 90696545 + ... + 90696764.

It is an arithmetic number, because the mean of its divisors is an integer number (2448809685).

Almost surely, 2^19953263990 is an apocalyptic number.

19953263990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19953263990 is a deficient number, since it is larger than the sum of its proper divisors (19227690970).

19953263990 is a wasteful number, since it uses less digits than its factorization.

19953263990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181393327.

The product of its (nonzero) digits is 3542940, while the sum is 56.

The spelling of 19953263990 in words is "nineteen billion, nine hundred fifty-three million, two hundred sixty-three thousand, nine hundred ninety".