21852140707 has 4 divisors (see below), whose sum is σ = 21892533376. Its totient is φ = 21811748040.

The previous prime is 21852140701. The next prime is 21852140759. The reversal of 21852140707 is 70704125812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21852140707 - 2¹⁵ = 21852107939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21852140701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20195523 + ... + 20196604.

It is an arithmetic number, because the mean of its divisors is an integer number (5473133344).

Almost surely, 2^21852140707 is an apocalyptic number.

21852140707 is a deficient number, since it is larger than the sum of its proper divisors (40392669).

21852140707 is an equidigital number, since it uses as much as digits as its factorization.

21852140707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40392668.

The product of its (nonzero) digits is 31360, while the sum is 37.

The spelling of 21852140707 in words is "twenty-one billion, eight hundred fifty-two million, one hundred forty thousand, seven hundred seven".