20538167461 has 8 divisors (see below), whose sum is σ = 24229359104. Its totient is φ = 17036267760.

The previous prime is 20538167453. The next prime is 20538167473. The reversal of 20538167461 is 16476183502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20538167461 - 2³ = 20538167453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20538167491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47322750 + ... + 47323183.

It is an arithmetic number, because the mean of its divisors is an integer number (3028669888).

Almost surely, 2^20538167461 is an apocalyptic number.

It is an amenable number.

20538167461 is a deficient number, since it is larger than the sum of its proper divisors (3691191643).

20538167461 is an equidigital number, since it uses as much as digits as its factorization.

20538167461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94645971.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20538167461 in words is "twenty billion, five hundred thirty-eight million, one hundred sixty-seven thousand, four hundred sixty-one".