20012347564 has 24 divisors (see below), whose sum is σ = 39866496768. Its totient is φ = 8701020240.

The previous prime is 20012347559. The next prime is 20012347567. The reversal of 20012347564 is 46574321002.

It is not an unprimeable number, because it can be changed into a prime (20012347567) 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, 9886512 + ... + 9888535.

It is an arithmetic number, because the mean of its divisors is an integer number (1661104032).

Almost surely, 2^20012347564 is an apocalyptic number.

It is an amenable number.

20012347564 is a deficient number, since it is larger than the sum of its proper divisors (19854149204).

20012347564 is a wasteful number, since it uses less digits than its factorization.

20012347564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19775085 (or 19775083 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 20012347564 its reverse (46574321002), we get a palindrome (66586668566).

The spelling of 20012347564 in words is "twenty billion, twelve million, three hundred forty-seven thousand, five hundred sixty-four".