21142860983 has 16 divisors (see below), whose sum is σ = 22498785120. Its totient is φ = 19811506176.

The previous prime is 21142860967. The next prime is 21142860989. The reversal of 21142860983 is 38906824112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21142860983 - 2⁴ = 21142860967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142860989) 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, 4850441 + ... + 4854797.

It is an arithmetic number, because the mean of its divisors is an integer number (1406174070).

Almost surely, 2^21142860983 is an apocalyptic number.

21142860983 is a deficient number, since it is larger than the sum of its proper divisors (1355924137).

21142860983 is a wasteful number, since it uses less digits than its factorization.

21142860983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 21142860983 in words is "twenty-one billion, one hundred forty-two million, eight hundred sixty thousand, nine hundred eighty-three".