20321416237 has 4 divisors (see below), whose sum is σ = 21390964480. Its totient is φ = 19251867996.

The previous prime is 20321416229. The next prime is 20321416249. The reversal of 20321416237 is 73261412302.

It is a happy number.

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 20321416237 - 2³ = 20321416229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321416199 and 20321416208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321416277) 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, 534774093 + ... + 534774130.

It is an arithmetic number, because the mean of its divisors is an integer number (5347741120).

Almost surely, 2^20321416237 is an apocalyptic number.

It is an amenable number.

20321416237 is a deficient number, since it is larger than the sum of its proper divisors (1069548243).

20321416237 is a wasteful number, since it uses less digits than its factorization.

20321416237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069548242.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 20321416237 its reverse (73261412302), we get a palindrome (93582828539).

The spelling of 20321416237 in words is "twenty billion, three hundred twenty-one million, four hundred sixteen thousand, two hundred thirty-seven".