20475245637535 has 16 divisors (see below), whose sum is σ = 26460718643520. Its totient is φ = 15119952134400.

The previous prime is 20475245637463. The next prime is 20475245637559. The reversal of 20475245637535 is 53573654257402.

It is not a de Polignac number, because 20475245637535 - 2²¹ = 20475243540383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20475245637535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1993110 + ... + 6702460.

It is an arithmetic number, because the mean of its divisors is an integer number (1653794915220).

Almost surely, 2^{20475245637535} is an apocalyptic number.

20475245637535 is a deficient number, since it is larger than the sum of its proper divisors (5985473005985).

20475245637535 is a wasteful number, since it uses less digits than its factorization.

20475245637535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776258.

The product of its (nonzero) digits is 105840000, while the sum is 58.

The spelling of 20475245637535 in words is "twenty trillion, four hundred seventy-five billion, two hundred forty-five million, six hundred thirty-seven thousand, five hundred thirty-five".