21273783294 has 16 divisors (see below), whose sum is σ = 43920069120. Its totient is φ = 6862510680.

The previous prime is 21273783253. The next prime is 21273783337. The reversal of 21273783294 is 49238737212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57187404 + ... + 57187775.

It is an arithmetic number, because the mean of its divisors is an integer number (2745004320).

Almost surely, 2^21273783294 is an apocalyptic number.

21273783294 is an abundant number, since it is smaller than the sum of its proper divisors (22646285826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21273783294 is a wasteful number, since it uses less digits than its factorization.

21273783294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114375215.

The product of its digits is 1016064, while the sum is 48.

The spelling of 21273783294 in words is "twenty-one billion, two hundred seventy-three million, seven hundred eighty-three thousand, two hundred ninety-four".