21447253095 has 16 divisors (see below), whose sum is σ = 35807588352. Its totient is φ = 10941207200.

The previous prime is 21447253081. The next prime is 21447253097. The reversal of 21447253095 is 59035274412.

It is a happy number.

It is not a de Polignac number, because 21447253095 - 2¹⁷ = 21447122023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21447253097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31082631 + ... + 31083320.

It is an arithmetic number, because the mean of its divisors is an integer number (2237974272).

Almost surely, 2^21447253095 is an apocalyptic number.

21447253095 is a deficient number, since it is larger than the sum of its proper divisors (14360335257).

21447253095 is a wasteful number, since it uses less digits than its factorization.

21447253095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62165982.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 21447253095 in words is "twenty-one billion, four hundred forty-seven million, two hundred fifty-three thousand, ninety-five".