21242885412 has 48 divisors (see below), whose sum is σ = 56689621632. Its totient is φ = 6064903680.

The previous prime is 21242885393. The next prime is 21242885431. The reversal of 21242885412 is 21458824212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21242885393) and next prime (21242885431).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21418 + ... + 207230.

It is an arithmetic number, because the mean of its divisors is an integer number (1181033784).

Almost surely, 2^21242885412 is an apocalyptic number.

It is an amenable number.

21242885412 is an abundant number, since it is smaller than the sum of its proper divisors (35446736220).

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

21242885412 is a wasteful number, since it uses less digits than its factorization.

21242885412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187188 (or 187186 counting only the distinct ones).

The product of its digits is 81920, while the sum is 39.

The spelling of 21242885412 in words is "twenty-one billion, two hundred forty-two million, eight hundred eighty-five thousand, four hundred twelve".