21004152020396 has 12 divisors (see below), whose sum is σ = 38691858985080. Its totient is φ = 9949335167520.

The previous prime is 21004152020393. The next prime is 21004152020419. The reversal of 21004152020396 is 69302025140012.

It is not an unprimeable number, because it can be changed into a prime (21004152020393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138185210585 + ... + 138185210736.

It is an arithmetic number, because the mean of its divisors is an integer number (3224321582090).

Almost surely, 2^{21004152020396} is an apocalyptic number.

It is an amenable number.

21004152020396 is a deficient number, since it is larger than the sum of its proper divisors (17687706964684).

21004152020396 is a wasteful number, since it uses less digits than its factorization.

21004152020396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276370421344 (or 276370421342 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21004152020396 in words is "twenty-one trillion, four billion, one hundred fifty-two million, twenty thousand, three hundred ninety-six".