21307381482 has 8 divisors (see below), whose sum is σ = 42614762976. Its totient is φ = 7102460492.

The previous prime is 21307381423. The next prime is 21307381483. The reversal of 21307381482 is 28418370312.

It is a sphenic number, since it is the product of 3 distinct primes.

21307381482 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21307381482.

It is not an unprimeable number, because it can be changed into a prime (21307381483) 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, 1775615118 + ... + 1775615129.

It is an arithmetic number, because the mean of its divisors is an integer number (5326845372).

Almost surely, 2^21307381482 is an apocalyptic number.

21307381482 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21307381482 is a wasteful number, since it uses less digits than its factorization.

21307381482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551230252.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 21307381482 in words is "twenty-one billion, three hundred seven million, three hundred eighty-one thousand, four hundred eighty-two".