19786602990 has 64 divisors (see below), whose sum is σ = 59205634560. Its totient is φ = 4111501440.

The previous prime is 19786602971. The next prime is 19786603013. The reversal of 19786602990 is 9920668791.

It is a self number, because there is not a number n which added to its sum of digits gives 19786602990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4280505 + ... + 4285124.

It is an arithmetic number, because the mean of its divisors is an integer number (925088040).

Almost surely, 2^19786602990 is an apocalyptic number.

19786602990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19786602990 is an abundant number, since it is smaller than the sum of its proper divisors (39419031570).

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

19786602990 is a wasteful number, since it uses less digits than its factorization.

19786602990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8565657.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 19786602990 in words is "nineteen billion, seven hundred eighty-six million, six hundred two thousand, nine hundred ninety".