21272514330 has 16 divisors (see below), whose sum is σ = 51054034464. Its totient is φ = 5672670480.

The previous prime is 21272514293. The next prime is 21272514337. The reversal of 21272514330 is 3341527212.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 709083811 = 21272514330 / (2 + 1 + 2 + 7 + 2 + 5 + 1 + 4 + 3 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21272514337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354541876 + ... + 354541935.

It is an arithmetic number, because the mean of its divisors is an integer number (3190877154).

Almost surely, 2^21272514330 is an apocalyptic number.

21272514330 is an abundant number, since it is smaller than the sum of its proper divisors (29781520134).

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

21272514330 is a wasteful number, since it uses less digits than its factorization.

21272514330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709083821.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 21272514330 in words is "twenty-one billion, two hundred seventy-two million, five hundred fourteen thousand, three hundred thirty".