21428858088 has 96 divisors (see below), whose sum is σ = 67036844160. Its totient is φ = 6111613440.

The previous prime is 21428858083. The next prime is 21428858107. The reversal of 21428858088 is 88085882412.

It is not an unprimeable number, because it can be changed into a prime (21428858083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 782320 + ... + 809247.

It is an arithmetic number, because the mean of its divisors is an integer number (698300460).

Almost surely, 2^21428858088 is an apocalyptic number.

It is an amenable number.

21428858088 is an abundant number, since it is smaller than the sum of its proper divisors (45607986072).

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

21428858088 is a wasteful number, since it uses less digits than its factorization.

21428858088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591607 (or 1591600 counting only the distinct ones).

The product of its (nonzero) digits is 2621440, while the sum is 54.

The spelling of 21428858088 in words is "twenty-one billion, four hundred twenty-eight million, eight hundred fifty-eight thousand, eighty-eight".