21707293080 has 64 divisors (see below), whose sum is σ = 71042054400. Its totient is φ = 5262373760.

The previous prime is 21707293061. The next prime is 21707293087. The reversal of 21707293080 is 8039270712.

It is a super-2 number, since 2×21707293080² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21707293087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8221140 + ... + 8223779.

It is an arithmetic number, because the mean of its divisors is an integer number (1110032100).

Almost surely, 2^21707293080 is an apocalyptic number.

21707293080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21707293080 is an abundant number, since it is smaller than the sum of its proper divisors (49334761320).

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

21707293080 is a wasteful number, since it uses less digits than its factorization.

21707293080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16444944 (or 16444940 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 21707293080 in words is "twenty-one billion, seven hundred seven million, two hundred ninety-three thousand, eighty".