21220202358 has 24 divisors (see below), whose sum is σ = 45994829400. Its totient is φ = 7070673984.

The previous prime is 21220202329. The next prime is 21220202359. The reversal of 21220202358 is 85320202212.

It is a super-2 number, since 2×21220202358² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220202359) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 178968 + ... + 272891.

It is an arithmetic number, because the mean of its divisors is an integer number (1916451225).

Almost surely, 2^21220202358 is an apocalyptic number.

21220202358 is an abundant number, since it is smaller than the sum of its proper divisors (24774627042).

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

21220202358 is a wasteful number, since it uses less digits than its factorization.

21220202358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454476 (or 454473 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 21220202358 in words is "twenty-one billion, two hundred twenty million, two hundred two thousand, three hundred fifty-eight".