21896546670 has 64 divisors (see below), whose sum is σ = 59492543040. Its totient is φ = 5728904064.

The previous prime is 21896546663. The next prime is 21896546671. The reversal of 21896546670 is 7664569812.

21896546670 is a `hidden beast` number, since 2 + 1 + 8 + 96 + 546 + 6 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21896546671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 750769 + ... + 779388.

It is an arithmetic number, because the mean of its divisors is an integer number (929570985).

Almost surely, 2^21896546670 is an apocalyptic number.

21896546670 is an abundant number, since it is smaller than the sum of its proper divisors (37595996370).

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

21896546670 is a wasteful number, since it uses less digits than its factorization.

21896546670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530226 (or 1530220 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

It can be divided in two parts, 2189654 and 6670, that added together give a square (2196324 = 1482²).

The spelling of 21896546670 in words is "twenty-one billion, eight hundred ninety-six million, five hundred forty-six thousand, six hundred seventy".