21357037098 has 16 divisors (see below), whose sum is σ = 47460082560. Its totient is φ = 7119012348.

The previous prime is 21357037073. The next prime is 21357037123. The reversal of 21357037098 is 89073075312.

It is a happy number.

21357037098 is a `hidden beast` number, since 2 + 1 + 3 + 570 + 3 + 70 + 9 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (21357037073) and next prime (21357037123).

It is a super-2 number, since 2×21357037098² (a number of 21 digits) contains 22 as substring.

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, 197750290 + ... + 197750397.

It is an arithmetic number, because the mean of its divisors is an integer number (2966255160).

Almost surely, 2^21357037098 is an apocalyptic number.

21357037098 is an abundant number, since it is smaller than the sum of its proper divisors (26103045462).

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

21357037098 is a wasteful number, since it uses less digits than its factorization.

21357037098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395500698 (or 395500692 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 21357037098 in words is "twenty-one billion, three hundred fifty-seven million, thirty-seven thousand, ninety-eight".