21507600134220 has 24 divisors (see below), whose sum is σ = 60221280375984. Its totient is φ = 5735360035776.

The previous prime is 21507600134197. The next prime is 21507600134239. The reversal of 21507600134220 is 2243100670512.

It is a super-4 number, since 4×21507600134220⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179230001059 + ... + 179230001178.

It is an arithmetic number, because the mean of its divisors is an integer number (2509220015666).

Almost surely, 2^{21507600134220} is an apocalyptic number.

21507600134220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21507600134220 is an abundant number, since it is smaller than the sum of its proper divisors (38713680241764).

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

21507600134220 is a wasteful number, since it uses less digits than its factorization.

21507600134220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358460002249 (or 358460002247 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 21507600134220 in words is "twenty-one trillion, five hundred seven billion, six hundred million, one hundred thirty-four thousand, two hundred twenty".