21274063742 has 8 divisors (see below), whose sum is σ = 31915074600. Its totient is φ = 10635705544.

The previous prime is 21274063729. The next prime is 21274063781. The reversal of 21274063742 is 24736047212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21274063696 and 21274063705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642992 + ... + 675267.

It is an arithmetic number, because the mean of its divisors is an integer number (3989384325).

Almost surely, 2^21274063742 is an apocalyptic number.

21274063742 is a deficient number, since it is larger than the sum of its proper divisors (10641010858).

21274063742 is a wasteful number, since it uses less digits than its factorization.

21274063742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326330.

The product of its (nonzero) digits is 112896, while the sum is 38.

The spelling of 21274063742 in words is "twenty-one billion, two hundred seventy-four million, sixty-three thousand, seven hundred forty-two".