21498331934 has 4 divisors (see below), whose sum is σ = 32247497904. Its totient is φ = 10749165966.

The previous prime is 21498331879. The next prime is 21498331973. The reversal of 21498331934 is 43913389412.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5374582982 + ... + 5374582985.

It is an arithmetic number, because the mean of its divisors is an integer number (8061874476).

Almost surely, 2^21498331934 is an apocalyptic number.

21498331934 is a deficient number, since it is larger than the sum of its proper divisors (10749165970).

21498331934 is a wasteful number, since it uses less digits than its factorization.

21498331934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10749165969.

The product of its digits is 559872, while the sum is 47.

The spelling of 21498331934 in words is "twenty-one billion, four hundred ninety-eight million, three hundred thirty-one thousand, nine hundred thirty-four".