20402213201 has 4 divisors (see below), whose sum is σ = 20402504304. Its totient is φ = 20401922100.

The previous prime is 20402213191. The next prime is 20402213219. The reversal of 20402213201 is 10231220402.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20402213201 - 2¹⁰ = 20402212177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402213201.

It is not an unprimeable number, because it can be changed into a prime (20402213291) 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, 30806 + ... + 204336.

It is an arithmetic number, because the mean of its divisors is an integer number (5100626076).

Almost surely, 2^20402213201 is an apocalyptic number.

It is an amenable number.

20402213201 is a deficient number, since it is larger than the sum of its proper divisors (291103).

20402213201 is a wasteful number, since it uses less digits than its factorization.

20402213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291102.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20402213201 its reverse (10231220402), we get a palindrome (30633433603).

The spelling of 20402213201 in words is "twenty billion, four hundred two million, two hundred thirteen thousand, two hundred one".