20352740366537 has 4 divisors (see below), whose sum is σ = 21549960388116. Its totient is φ = 19155520344960.

The previous prime is 20352740366521. The next prime is 20352740366561. The reversal of 20352740366537 is 73566304725302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15488404251961 + 4864336114576 = 3935531^2 + 2205524^2 .

It is a cyclic number.

It is not a de Polignac number, because 20352740366537 - 2⁴ = 20352740366521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20352740366597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598610010764 + ... + 598610010797.

It is an arithmetic number, because the mean of its divisors is an integer number (5387490097029).

Almost surely, 2^{20352740366537} is an apocalyptic number.

It is an amenable number.

20352740366537 is a deficient number, since it is larger than the sum of its proper divisors (1197220021579).

20352740366537 is a wasteful number, since it uses less digits than its factorization.

20352740366537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197220021578.

The product of its (nonzero) digits is 19051200, while the sum is 53.

The spelling of 20352740366537 in words is "twenty trillion, three hundred fifty-two billion, seven hundred forty million, three hundred sixty-six thousand, five hundred thirty-seven".