21836279990 has 32 divisors (see below), whose sum is σ = 45095171904. Its totient is φ = 7457587200.

The previous prime is 21836279977. The next prime is 21836280007. The reversal of 21836279990 is 9997263812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588911 + ... + 624890.

It is an arithmetic number, because the mean of its divisors is an integer number (1409224122).

Almost surely, 2^21836279990 is an apocalyptic number.

21836279990 is an abundant number, since it is smaller than the sum of its proper divisors (23258891914).

21836279990 is a wasteful number, since it uses less digits than its factorization.

21836279990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214072.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 21836279990 in words is "twenty-one billion, eight hundred thirty-six million, two hundred seventy-nine thousand, nine hundred ninety".