21027552130340 has 48 divisors (see below), whose sum is σ = 50625324352512. Its totient is φ = 7186703696256.

The previous prime is 21027552130337. The next prime is 21027552130369. The reversal of 21027552130340 is 4303125572012.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 21027552130340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236859092 + ... + 236947851.

It is an arithmetic number, because the mean of its divisors is an integer number (1054694257344).

Almost surely, 2^{21027552130340} is an apocalyptic number.

21027552130340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21027552130340 is an abundant number, since it is smaller than the sum of its proper divisors (29597772222172).

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

21027552130340 is a wasteful number, since it uses less digits than its factorization.

21027552130340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473807276 (or 473807274 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 21027552130340 in words is "twenty-one trillion, twenty-seven billion, five hundred fifty-two million, one hundred thirty thousand, three hundred forty".