20013141920 has 48 divisors (see below), whose sum is σ = 47749215528. Its totient is φ = 7925990400.

The previous prime is 20013141877. The next prime is 20013141923. The reversal of 20013141920 is 2914131002.

It can be written as a sum of positive squares in 4 ways, for example, as 19402261264 + 610880656 = 139292^2 + 24716^2 .

It is a super-2 number, since 2×20013141920² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20013141923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603059 + ... + 635378.

Almost surely, 2^20013141920 is an apocalyptic number.

20013141920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013141920 is an abundant number, since it is smaller than the sum of its proper divisors (27736073608).

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

20013141920 is a wasteful number, since it uses less digits than its factorization.

20013141920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238553 (or 1238545 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20013141920 its reverse (2914131002), we get a palindrome (22927272922).

The spelling of 20013141920 in words is "twenty billion, thirteen million, one hundred forty-one thousand, nine hundred twenty".