20374819566725 has 18 divisors (see below), whose sum is σ = 27357716313846. Its totient is φ = 15046020600000.

The previous prime is 20374819566721. The next prime is 20374819566727. The reversal of 20374819566725 is 52766591847302.

It can be written as a sum of positive squares in 9 ways, for example, as 15899047744321 + 4475771822404 = 3987361^2 + 2115602^2 .

It is not a de Polignac number, because 20374819566725 - 2² = 20374819566721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20374819566721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2411217026 + ... + 2411225475.

It is an arithmetic number, because the mean of its divisors is an integer number (1519873128547).

It is a 1-persistent number, because it is pandigital, but 2⋅20374819566725 = 40749639133450 is not.

Almost surely, 2^{20374819566725} is an apocalyptic number.

20374819566725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20374819566725 is a deficient number, since it is larger than the sum of its proper divisors (6982896747121).

20374819566725 is a wasteful number, since it uses less digits than its factorization.

20374819566725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822442537 (or 4822442519 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 65.

The spelling of 20374819566725 in words is "twenty trillion, three hundred seventy-four billion, eight hundred nineteen million, five hundred sixty-six thousand, seven hundred twenty-five".