21702854839064 has 32 divisors (see below), whose sum is σ = 47640413066400. Its totient is φ = 9074364391680.

The previous prime is 21702854838971. The next prime is 21702854839069. The reversal of 21702854839064 is 46093845820712.

It is a junction number, because it is equal to n+sod(n) for n = 21702854838994 and 21702854839012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21702854839069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4726229159 + ... + 4726233750.

It is an arithmetic number, because the mean of its divisors is an integer number (1488762908325).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21702854839064 = 43405709678128, but 3⋅21702854839064 = 65108564517192 is not.

Almost surely, 2^{21702854839064} is an apocalyptic number.

It is an amenable number.

21702854839064 is an abundant number, since it is smaller than the sum of its proper divisors (25937558227336).

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

21702854839064 is a wasteful number, since it uses less digits than its factorization.

21702854839064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9452462963 (or 9452462959 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 21702854839064 in words is "twenty-one trillion, seven hundred two billion, eight hundred fifty-four million, eight hundred thirty-nine thousand, sixty-four".