21526340998 has 8 divisors (see below), whose sum is σ = 32678542008. Its totient is φ = 10633493664.

The previous prime is 21526340993. The next prime is 21526341017. The reversal of 21526340998 is 89904362512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21526340993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64838211 + ... + 64838542.

It is an arithmetic number, because the mean of its divisors is an integer number (4084817751).

Almost surely, 2^21526340998 is an apocalyptic number.

21526340998 is a deficient number, since it is larger than the sum of its proper divisors (11152201010).

21526340998 is a wasteful number, since it uses less digits than its factorization.

21526340998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129676838.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 21526340998 in words is "twenty-one billion, five hundred twenty-six million, three hundred forty thousand, nine hundred ninety-eight".