21394670076 has 96 divisors (see below), whose sum is σ = 61794331200. Its totient is φ = 6355964160.

The previous prime is 21394670069. The next prime is 21394670147. The reversal of 21394670076 is 67007649312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222015 + ... + 303446.

It is an arithmetic number, because the mean of its divisors is an integer number (643690950).

Almost surely, 2^21394670076 is an apocalyptic number.

21394670076 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21394670076 is an abundant number, since it is smaller than the sum of its proper divisors (40399661124).

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

21394670076 is a wasteful number, since it uses less digits than its factorization.

21394670076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525516 (or 525508 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 21394670076 in words is "twenty-one billion, three hundred ninety-four million, six hundred seventy thousand, seventy-six".