21402794939379 has 16 divisors (see below), whose sum is σ = 32750242114560. Its totient is φ = 12178996280640.

The previous prime is 21402794939347. The next prime is 21402794939381. The reversal of 21402794939379 is 97393949720412.

It is not a de Polignac number, because 21402794939379 - 2⁵ = 21402794939347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21402794939879) 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, 2132172202 + ... + 2132182239.

It is an arithmetic number, because the mean of its divisors is an integer number (2046890132160).

Almost surely, 2^{21402794939379} is an apocalyptic number.

21402794939379 is a deficient number, since it is larger than the sum of its proper divisors (11347447175181).

21402794939379 is a wasteful number, since it uses less digits than its factorization.

21402794939379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264354690.

The product of its (nonzero) digits is 185177664, while the sum is 69.

The spelling of 21402794939379 in words is "twenty-one trillion, four hundred two billion, seven hundred ninety-four million, nine hundred thirty-nine thousand, three hundred seventy-nine".