21550698352 has 10 divisors (see below), whose sum is σ = 41754478088. Its totient is φ = 10775349168.

The previous prime is 21550698311. The next prime is 21550698353. The reversal of 21550698352 is 25389605512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21550698353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673459308 + ... + 673459339.

Almost surely, 2^21550698352 is an apocalyptic number.

It is an amenable number.

21550698352 is a deficient number, since it is larger than the sum of its proper divisors (20203779736).

21550698352 is a wasteful number, since it uses less digits than its factorization.

21550698352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346918655 (or 1346918649 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 21550698352 in words is "twenty-one billion, five hundred fifty million, six hundred ninety-eight thousand, three hundred fifty-two".