20658100408 has 32 divisors (see below), whose sum is σ = 42764319360. Its totient is φ = 9276909280.

The previous prime is 20658100403. The next prime is 20658100429. The reversal of 20658100408 is 80400185602.

It is a super-2 number, since 2×20658100408² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20658100403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406860 + ... + 1421467.

It is an arithmetic number, because the mean of its divisors is an integer number (1336384980).

Almost surely, 2^20658100408 is an apocalyptic number.

It is an amenable number.

20658100408 is an abundant number, since it is smaller than the sum of its proper divisors (22106218952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20658100408 is a wasteful number, since it uses less digits than its factorization.

20658100408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828427 (or 2828423 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 20658100408 in words is "twenty billion, six hundred fifty-eight million, one hundred thousand, four hundred eight".