20311442021 has 8 divisors (see below), whose sum is σ = 21877870560. Its totient is φ = 18745586352.

The previous prime is 20311442003. The next prime is 20311442077. The reversal of 20311442021 is 12024411302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20311442021 - 2¹⁴ = 20311425637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20311441984 and 20311442002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311442321) 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, 68111 + ... + 212748.

It is an arithmetic number, because the mean of its divisors is an integer number (2734733820).

Almost surely, 2^20311442021 is an apocalyptic number.

It is an amenable number.

20311442021 is a deficient number, since it is larger than the sum of its proper divisors (1566428539).

20311442021 is a wasteful number, since it uses less digits than its factorization.

20311442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286435.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20311442021 its reverse (12024411302), we get a palindrome (32335853323).

The spelling of 20311442021 in words is "twenty billion, three hundred eleven million, four hundred forty-two thousand, twenty-one".