21439258063284 has 36 divisors (see below), whose sum is σ = 53140675415744. Its totient is φ = 6726041744256.

The previous prime is 21439258063277. The next prime is 21439258063309. The reversal of 21439258063284 is 48236085293412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3091008364 + ... + 3091015299.

Almost surely, 2^{21439258063284} is an apocalyptic number.

It is an amenable number.

21439258063284 is an abundant number, since it is smaller than the sum of its proper divisors (31701417352460).

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

21439258063284 is a wasteful number, since it uses less digits than its factorization.

21439258063284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6182023704 (or 6182023685 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 21439258063284 in words is "twenty-one trillion, four hundred thirty-nine billion, two hundred fifty-eight million, sixty-three thousand, two hundred eighty-four".