21060750172 has 48 divisors (see below), whose sum is σ = 46888531200. Its totient is φ = 8205481200.

The previous prime is 21060750157. The next prime is 21060750173. The reversal of 21060750172 is 27105706012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060750173) 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, 682654 + ... + 712837.

It is an arithmetic number, because the mean of its divisors is an integer number (976844400).

Almost surely, 2^21060750172 is an apocalyptic number.

21060750172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21060750172 is an abundant number, since it is smaller than the sum of its proper divisors (25827781028).

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

21060750172 is a wasteful number, since it uses less digits than its factorization.

21060750172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395527 (or 1395511 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The spelling of 21060750172 in words is "twenty-one billion, sixty million, seven hundred fifty thousand, one hundred seventy-two".