21488954116 has 24 divisors (see below), whose sum is σ = 43855011200. Its totient is φ = 9209551176.

The previous prime is 21488954111. The next prime is 21488954131. The reversal of 21488954116 is 61145988412.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 21488954116.

It is not an unprimeable number, because it can be changed into a prime (21488954111) 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, 7829880 + ... + 7832623.

Almost surely, 2^21488954116 is an apocalyptic number.

It is an amenable number.

21488954116 is an abundant number, since it is smaller than the sum of its proper divisors (22366057084).

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

21488954116 is a wasteful number, since it uses less digits than its factorization.

21488954116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15662528 (or 15662512 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The spelling of 21488954116 in words is "twenty-one billion, four hundred eighty-eight million, nine hundred fifty-four thousand, one hundred sixteen".