21726156414742 has 32 divisors (see below), whose sum is σ = 35152128557280. Its totient is φ = 10011459548160.

The previous prime is 21726156414577. The next prime is 21726156414749. The reversal of 21726156414742 is 24741465162712.

It is a self number, because there is not a number n which added to its sum of digits gives 21726156414742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21726156414749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46457017 + ... + 46922347.

It is an arithmetic number, because the mean of its divisors is an integer number (1098504017415).

Almost surely, 2^{21726156414742} is an apocalyptic number.

21726156414742 is a deficient number, since it is larger than the sum of its proper divisors (13425972142538).

21726156414742 is a wasteful number, since it uses less digits than its factorization.

21726156414742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468208.

The product of its digits is 4515840, while the sum is 52.

The spelling of 21726156414742 in words is "twenty-one trillion, seven hundred twenty-six billion, one hundred fifty-six million, four hundred fourteen thousand, seven hundred forty-two".