20612264240 has 40 divisors (see below), whose sum is σ = 47929596000. Its totient is φ = 8243859456.

The previous prime is 20612264237. The next prime is 20612264303. The reversal of 20612264240 is 4246221602.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1050197 + ... + 1069643.

It is an arithmetic number, because the mean of its divisors is an integer number (1198239900).

Almost surely, 2^20612264240 is an apocalyptic number.

20612264240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20612264240 is an abundant number, since it is smaller than the sum of its proper divisors (27317331760).

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

20612264240 is a wasteful number, since it uses less digits than its factorization.

20612264240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32709 (or 32703 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 20612264240 its reverse (4246221602), we get a palindrome (24858485842).

The spelling of 20612264240 in words is "twenty billion, six hundred twelve million, two hundred sixty-four thousand, two hundred forty".