21114419656 has 64 divisors (see below), whose sum is σ = 43880823360. Its totient is φ = 9523571200.

The previous prime is 21114419653. The next prime is 21114419657. The reversal of 21114419656 is 65691441112.

It is not an unprimeable number, because it can be changed into a prime (21114419653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1387320 + ... + 1402456.

It is an arithmetic number, because the mean of its divisors is an integer number (685637865).

Almost surely, 2^21114419656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21114419656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21940411680).

21114419656 is an abundant number, since it is smaller than the sum of its proper divisors (22766403704).

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

21114419656 is a wasteful number, since it uses less digits than its factorization.

21114419656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15307 (or 15281 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The spelling of 21114419656 in words is "twenty-one billion, one hundred fourteen million, four hundred nineteen thousand, six hundred fifty-six".