21683758290 has 16 divisors (see below), whose sum is σ = 52041019968. Its totient is φ = 5782335536.

The previous prime is 21683758253. The next prime is 21683758309. The reversal of 21683758290 is 9285738612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361395942 + ... + 361396001.

It is an arithmetic number, because the mean of its divisors is an integer number (3252563748).

Almost surely, 2^21683758290 is an apocalyptic number.

21683758290 is an abundant number, since it is smaller than the sum of its proper divisors (30357261678).

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

21683758290 is a wasteful number, since it uses less digits than its factorization.

21683758290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722791953.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 21683758290 in words is "twenty-one billion, six hundred eighty-three million, seven hundred fifty-eight thousand, two hundred ninety".