20021313401 has 4 divisors (see below), whose sum is σ = 20891805312. Its totient is φ = 19150821492.

The previous prime is 20021313379. The next prime is 20021313407. The reversal of 20021313401 is 10431312002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20021313401 - 2¹⁴ = 20021297017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021313401.

It is not an unprimeable number, because it can be changed into a prime (20021313407) 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, 435245921 + ... + 435245966.

It is an arithmetic number, because the mean of its divisors is an integer number (5222951328).

Almost surely, 2^20021313401 is an apocalyptic number.

It is an amenable number.

20021313401 is a deficient number, since it is larger than the sum of its proper divisors (870491911).

20021313401 is an equidigital number, since it uses as much as digits as its factorization.

20021313401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870491910.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20021313401 its reverse (10431312002), we get a palindrome (30452625403).

The spelling of 20021313401 in words is "twenty billion, twenty-one million, three hundred thirteen thousand, four hundred one".