21129038262 has 12 divisors (see below), whose sum is σ = 45779582940. Its totient is φ = 7043012748.

The previous prime is 21129038257. The next prime is 21129038279. The reversal of 21129038262 is 26283092112.

It is a happy number.

21129038262 is a `hidden beast` number, since 211 + 2 + 9 + 0 + 382 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586917712 + ... + 586917747.

It is an arithmetic number, because the mean of its divisors is an integer number (3814965245).

Almost surely, 2^21129038262 is an apocalyptic number.

21129038262 is an abundant number, since it is smaller than the sum of its proper divisors (24650544678).

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

21129038262 is a wasteful number, since it uses less digits than its factorization.

21129038262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173835467 (or 1173835464 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 21129038262 in words is "twenty-one billion, one hundred twenty-nine million, thirty-eight thousand, two hundred sixty-two".