20933992237 has 2 divisors, whose sum is σ = 20933992238. Its totient is φ = 20933992236.

The previous prime is 20933992217. The next prime is 20933992267. The reversal of 20933992237 is 73229933902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19702613956 + 1231378281 = 140366^2 + 35091^2 .

It is a cyclic number.

It is not a de Polignac number, because 20933992237 - 2¹⁵ = 20933959469 is a prime.

It is a super-3 number, since 3×20933992237³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20933992217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466996118 + 10466996119.

It is an arithmetic number, because the mean of its divisors is an integer number (10466996119).

Almost surely, 2^20933992237 is an apocalyptic number.

It is an amenable number.

20933992237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933992237 is an equidigital number, since it uses as much as digits as its factorization.

20933992237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 49.

The spelling of 20933992237 in words is "twenty billion, nine hundred thirty-three million, nine hundred ninety-two thousand, two hundred thirty-seven".