20373656001261 has 4 divisors (see below), whose sum is σ = 27164874668352. Its totient is φ = 13582437334172.

The previous prime is 20373656001203. The next prime is 20373656001287. The reversal of 20373656001261 is 16210065637302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20373656001261 - 2⁷ = 20373656001133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20373656008261) 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, 3395609333541 + ... + 3395609333546.

It is an arithmetic number, because the mean of its divisors is an integer number (6791218667088).

Almost surely, 2^{20373656001261} is an apocalyptic number.

It is an amenable number.

20373656001261 is a deficient number, since it is larger than the sum of its proper divisors (6791218667091).

20373656001261 is an equidigital number, since it uses as much as digits as its factorization.

20373656001261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791218667090.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 20373656001261 in words is "twenty trillion, three hundred seventy-three billion, six hundred fifty-six million, one thousand, two hundred sixty-one".