21202427088 has 120 divisors (see below), whose sum is σ = 63427815360. Its totient is φ = 6595269120.

The previous prime is 21202427041. The next prime is 21202427093. The reversal of 21202427088 is 88072420212.

21202427088 is a `hidden beast` number, since 21 + 202 + 427 + 0 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57723 + ... + 213861.

It is an arithmetic number, because the mean of its divisors is an integer number (528565128).

Almost surely, 2^21202427088 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 21202427088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31713907680).

21202427088 is an abundant number, since it is smaller than the sum of its proper divisors (42225388272).

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

21202427088 is a wasteful number, since it uses less digits than its factorization.

21202427088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156217 (or 156208 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The spelling of 21202427088 in words is "twenty-one billion, two hundred two million, four hundred twenty-seven thousand, eighty-eight".