20136537335451 has 32 divisors (see below), whose sum is σ = 28494152930880. Its totient is φ = 12605346164736.

The previous prime is 20136537335449. The next prime is 20136537335501. The reversal of 20136537335451 is 15453373563102.

It is not a de Polignac number, because 20136537335451 - 2¹ = 20136537335449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20136537335451.

It is not an unprimeable number, because it can be changed into a prime (20136537335051) 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, 37821885 + ... + 38350593.

It is an arithmetic number, because the mean of its divisors is an integer number (890442279090).

Almost surely, 2^{20136537335451} is an apocalyptic number.

20136537335451 is a deficient number, since it is larger than the sum of its proper divisors (8357615595429).

20136537335451 is a wasteful number, since it uses less digits than its factorization.

20136537335451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530463.

The product of its (nonzero) digits is 3402000, while the sum is 48.

The spelling of 20136537335451 in words is "twenty trillion, one hundred thirty-six billion, five hundred thirty-seven million, three hundred thirty-five thousand, four hundred fifty-one".