21426368998 has 16 divisors (see below), whose sum is σ = 33249141504. Its totient is φ = 10347549120.

The previous prime is 21426368969. The next prime is 21426369001. The reversal of 21426368998 is 89986362412.

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, 1046598 + ... + 1066873.

It is an arithmetic number, because the mean of its divisors is an integer number (2078071344).

Almost surely, 2^21426368998 is an apocalyptic number.

21426368998 is a deficient number, since it is larger than the sum of its proper divisors (11822772506).

21426368998 is a wasteful number, since it uses less digits than its factorization.

21426368998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113647.

The product of its digits is 8957952, while the sum is 58.

The spelling of 21426368998 in words is "twenty-one billion, four hundred twenty-six million, three hundred sixty-eight thousand, nine hundred ninety-eight".