21421342983 has 32 divisors (see below), whose sum is σ = 30610483200. Its totient is φ = 13277316096.

The previous prime is 21421342973. The next prime is 21421343023. The reversal of 21421342983 is 38924312412.

It is not a de Polignac number, because 21421342983 - 2⁴ = 21421342967 is a prime.

It is a super-3 number, since 3×21421342983³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421342903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7982760 + ... + 7985442.

It is an arithmetic number, because the mean of its divisors is an integer number (956577600).

Almost surely, 2^21421342983 is an apocalyptic number.

21421342983 is a deficient number, since it is larger than the sum of its proper divisors (9189140217).

21421342983 is a wasteful number, since it uses less digits than its factorization.

21421342983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551.

The product of its digits is 82944, while the sum is 39.

The spelling of 21421342983 in words is "twenty-one billion, four hundred twenty-one million, three hundred forty-two thousand, nine hundred eighty-three".