20354621356 has 12 divisors (see below), whose sum is σ = 37715916168. Its totient is φ = 9578645312.

The previous prime is 20354621333. The next prime is 20354621369. The reversal of 20354621356 is 65312645302.

It is a super-2 number, since 2×20354621356² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149666266 + ... + 149666401.

It is an arithmetic number, because the mean of its divisors is an integer number (3142993014).

Almost surely, 2^20354621356 is an apocalyptic number.

It is an amenable number.

20354621356 is a deficient number, since it is larger than the sum of its proper divisors (17361294812).

20354621356 is a wasteful number, since it uses less digits than its factorization.

20354621356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299332688 (or 299332686 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20354621356 in words is "twenty billion, three hundred fifty-four million, six hundred twenty-one thousand, three hundred fifty-six".