20021202323 has 4 divisors (see below), whose sum is σ = 20711588640. Its totient is φ = 19330816008.

The previous prime is 20021202307. The next prime is 20021202361. The reversal of 20021202323 is 32320212002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20021202323 - 2⁴ = 20021202307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021202623) 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, 345193115 + ... + 345193172.

It is an arithmetic number, because the mean of its divisors is an integer number (5177897160).

Almost surely, 2^20021202323 is an apocalyptic number.

20021202323 is a deficient number, since it is larger than the sum of its proper divisors (690386317).

20021202323 is an equidigital number, since it uses as much as digits as its factorization.

20021202323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690386316.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20021202323 its reverse (32320212002), we get a palindrome (52341414325).

The spelling of 20021202323 in words is "twenty billion, twenty-one million, two hundred two thousand, three hundred twenty-three".