21726254098 has 4 divisors (see below), whose sum is σ = 32589381150. Its totient is φ = 10863127048.

The previous prime is 21726254071. The next prime is 21726254101. The reversal of 21726254098 is 89045262712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14923798569 + 6802455529 = 122163^2 + 82477^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5431563523 + ... + 5431563526.

Almost surely, 2^21726254098 is an apocalyptic number.

21726254098 is a deficient number, since it is larger than the sum of its proper divisors (10863127052).

21726254098 is a wasteful number, since it uses less digits than its factorization.

21726254098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10863127051.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 21726254098 in words is "twenty-one billion, seven hundred twenty-six million, two hundred fifty-four thousand, ninety-eight".