20464412540 has 96 divisors (see below), whose sum is σ = 52117309440. Its totient is φ = 6647558400.

The previous prime is 20464412539. The next prime is 20464412543. The reversal of 20464412540 is 4521446402.

It is a junction number, because it is equal to n+sod(n) for n = 20464412497 and 20464412506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464412543) 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, 26750 + ... + 204069.

It is an arithmetic number, because the mean of its divisors is an integer number (542888640).

Almost surely, 2^20464412540 is an apocalyptic number.

20464412540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20464412540 is an abundant number, since it is smaller than the sum of its proper divisors (31652896900).

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

20464412540 is a wasteful number, since it uses less digits than its factorization.

20464412540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230883 (or 230881 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 20464412540 its reverse (4521446402), we get a palindrome (24985858942).

The spelling of 20464412540 in words is "twenty billion, four hundred sixty-four million, four hundred twelve thousand, five hundred forty".