20655534898 has 4 divisors (see below), whose sum is σ = 30983302350. Its totient is φ = 10327767448.

The previous prime is 20655534883. The next prime is 20655534919. The reversal of 20655534898 is 89843555602.

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

It can be written as a sum of positive squares in only one way, i.e., 13767032889 + 6888502009 = 117333^2 + 82997^2 .

It is a super-2 number, since 2×20655534898² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5163883723 + ... + 5163883726.

Almost surely, 2^20655534898 is an apocalyptic number.

20655534898 is a deficient number, since it is larger than the sum of its proper divisors (10327767452).

20655534898 is a wasteful number, since it uses less digits than its factorization.

20655534898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327767451.

The product of its (nonzero) digits is 10368000, while the sum is 55.

The spelling of 20655534898 in words is "twenty billion, six hundred fifty-five million, five hundred thirty-four thousand, eight hundred ninety-eight".