20013455502 has 24 divisors (see below), whose sum is σ = 43377807720. Its totient is φ = 6668794800.

The previous prime is 20013455477. The next prime is 20013455503. The reversal of 20013455502 is 20555431002.

It is a happy number.

20013455502 is a `hidden beast` number, since 20 + 0 + 134 + 5 + 5 + 502 = 666.

It is a super-2 number, since 2×20013455502² (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 (20013455503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143677 + ... + 246312.

It is an arithmetic number, because the mean of its divisors is an integer number (1807408655).

Almost surely, 2^20013455502 is an apocalyptic number.

20013455502 is an abundant number, since it is smaller than the sum of its proper divisors (23364352218).

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

20013455502 is a wasteful number, since it uses less digits than its factorization.

20013455502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392848 (or 392845 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 20013455502 its reverse (20555431002), we get a palindrome (40568886504).

The spelling of 20013455502 in words is "twenty billion, thirteen million, four hundred fifty-five thousand, five hundred two".