20401534337 has 4 divisors (see below), whose sum is σ = 20402178096. Its totient is φ = 20400890580.

The previous prime is 20401534319. The next prime is 20401534343. The reversal of 20401534337 is 73343510402.

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 20401534337 - 2²⁰ = 20400485761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401534357) 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, 271739 + ... + 338592.

It is an arithmetic number, because the mean of its divisors is an integer number (5100544524).

Almost surely, 2^20401534337 is an apocalyptic number.

It is an amenable number.

20401534337 is a deficient number, since it is larger than the sum of its proper divisors (643759).

20401534337 is an equidigital number, since it uses as much as digits as its factorization.

20401534337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643758.

The product of its (nonzero) digits is 30240, while the sum is 32.

The spelling of 20401534337 in words is "twenty billion, four hundred one million, five hundred thirty-four thousand, three hundred thirty-seven".