20235437601 has 4 divisors (see below), whose sum is σ = 26980583472. Its totient is φ = 13490291732.

The previous prime is 20235437591. The next prime is 20235437609. The reversal of 20235437601 is 10673453202.

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 a de Polignac number, because none of the positive numbers 2^k-20235437601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20235437609) 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, 3372572931 + ... + 3372572936.

It is an arithmetic number, because the mean of its divisors is an integer number (6745145868).

Almost surely, 2^20235437601 is an apocalyptic number.

It is an amenable number.

20235437601 is a deficient number, since it is larger than the sum of its proper divisors (6745145871).

20235437601 is an equidigital number, since it uses as much as digits as its factorization.

20235437601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745145870.

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 20235437601 in words is "twenty billion, two hundred thirty-five million, four hundred thirty-seven thousand, six hundred one".