21634546022 has 4 divisors (see below), whose sum is σ = 32451819036. Its totient is φ = 10817273010.

The previous prime is 21634546019. The next prime is 21634546081. The reversal of 21634546022 is 22064543612.

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, 5408636504 + ... + 5408636507.

It is an arithmetic number, because the mean of its divisors is an integer number (8112954759).

Almost surely, 2^21634546022 is an apocalyptic number.

21634546022 is a deficient number, since it is larger than the sum of its proper divisors (10817273014).

21634546022 is a wasteful number, since it uses less digits than its factorization.

21634546022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10817273013.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 21634546022 in words is "twenty-one billion, six hundred thirty-four million, five hundred forty-six thousand, twenty-two".