20136723560 has 48 divisors (see below), whose sum is σ = 47363222340. Its totient is φ = 7704477440.

The previous prime is 20136723553. The next prime is 20136723611. The reversal of 20136723560 is 6532763102.

It can be written as a sum of positive squares in 2 ways, for example, as 19826329636 + 310393924 = 140806^2 + 17618^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20136723560.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 454661 + ... + 496980.

Almost surely, 2^20136723560 is an apocalyptic number.

20136723560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20136723560 is an abundant number, since it is smaller than the sum of its proper divisors (27226498780).

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

20136723560 is a wasteful number, since it uses less digits than its factorization.

20136723560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951698 (or 951671 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 20136723560 in words is "twenty billion, one hundred thirty-six million, seven hundred twenty-three thousand, five hundred sixty".