20223431300021 has 8 divisors (see below), whose sum is σ = 20370776313888. Its totient is φ = 20076477642000.

The previous prime is 20223431299999. The next prime is 20223431300047. The reversal of 20223431300021 is 12000313432202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20223431300021 is a prime.

It is a super-2 number, since 2×20223431300021² (a number of 27 digits) contains 22 as substring.

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 20223431300021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223431300071) 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, 97735235 + ... + 97941936.

It is an arithmetic number, because the mean of its divisors is an integer number (2546347039236).

Almost surely, 2^{20223431300021} is an apocalyptic number.

It is an amenable number.

20223431300021 is a deficient number, since it is larger than the sum of its proper divisors (147345013867).

20223431300021 is a wasteful number, since it uses less digits than its factorization.

20223431300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195677923.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20223431300021 its reverse (12000313432202), we get a palindrome (32223744732223).

The spelling of 20223431300021 in words is "twenty trillion, two hundred twenty-three billion, four hundred thirty-one million, three hundred thousand, twenty-one".