220521230004 has 12 divisors (see below), whose sum is σ = 514549536704. Its totient is φ = 73507076664.

The previous prime is 220521229979. The next prime is 220521230029. The reversal of 220521230004 is 400032125022.

It is an interprime number because it is at equal distance from previous prime (220521229979) and next prime (220521230029).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×220521230004² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9188384572 + ... + 9188384595.

Almost surely, 2^220521230004 is an apocalyptic number.

It is an amenable number.

220521230004 is an abundant number, since it is smaller than the sum of its proper divisors (294028306700).

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

220521230004 is a wasteful number, since it uses less digits than its factorization.

220521230004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18376769174 (or 18376769172 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 220521230004 its reverse (400032125022), we get a palindrome (620553355026).

The spelling of 220521230004 in words is "two hundred twenty billion, five hundred twenty-one million, two hundred thirty thousand, four".