20236312140 has 96 divisors (see below), whose sum is σ = 65066077440. Its totient is φ = 4647571200.

The previous prime is 20236312127. The next prime is 20236312141. The reversal of 20236312140 is 4121363202.

It is a super-2 number, since 2×20236312140² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20236312140.

It is not an unprimeable number, because it can be changed into a prime (20236312141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 794331 + ... + 819410.

It is an arithmetic number, because the mean of its divisors is an integer number (677771640).

Almost surely, 2^20236312140 is an apocalyptic number.

20236312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20236312140 is an abundant number, since it is smaller than the sum of its proper divisors (44829765300).

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

20236312140 is a wasteful number, since it uses less digits than its factorization.

20236312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613783 (or 1613781 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20236312140 its reverse (4121363202), we get a palindrome (24357675342).

The spelling of 20236312140 in words is "twenty billion, two hundred thirty-six million, three hundred twelve thousand, one hundred forty".