21317973915098 has 32 divisors (see below), whose sum is σ = 38715101553024. Its totient is φ = 8594337341952.

The previous prime is 21317973915097. The next prime is 21317973915103. The reversal of 21317973915098 is 89051937971312.

It is a super-2 number, since 2×21317973915098² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21317973915097) 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, 23031011 + ... + 23938742.

It is an arithmetic number, because the mean of its divisors is an integer number (1209846923532).

Almost surely, 2^{21317973915098} is an apocalyptic number.

21317973915098 is a deficient number, since it is larger than the sum of its proper divisors (17397127637926).

21317973915098 is a wasteful number, since it uses less digits than its factorization.

21317973915098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46971686.

The product of its (nonzero) digits is 25719120, while the sum is 65.

The spelling of 21317973915098 in words is "twenty-one trillion, three hundred seventeen billion, nine hundred seventy-three million, nine hundred fifteen thousand, ninety-eight".