21107172357862 has 16 divisors (see below), whose sum is σ = 33660658792800. Its totient is φ = 9904267914112.

The previous prime is 21107172357857. The next prime is 21107172357889. The reversal of 21107172357862 is 26875327170112.

It is a super-2 number, since 2×21107172357862² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4328785987 + ... + 4328790862.

It is an arithmetic number, because the mean of its divisors is an integer number (2103791174550).

Almost surely, 2^{21107172357862} is an apocalyptic number.

21107172357862 is a deficient number, since it is larger than the sum of its proper divisors (12553486434938).

21107172357862 is a wasteful number, since it uses less digits than its factorization.

21107172357862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657576927.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 21107172357862 in words is "twenty-one trillion, one hundred seven billion, one hundred seventy-two million, three hundred fifty-seven thousand, eight hundred sixty-two".