18926939 has 2 divisors, whose sum is σ = 18926940. Its totient is φ = 18926938.

The previous prime is 18926927. The next prime is 18926951. The reversal of 18926939 is 93962981.

It is a balanced prime because it is at equal distance from previous prime (18926927) and next prime (18926951).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18926939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18926893 and 18926902.

It is not a weakly prime, because it can be changed into another prime (18926239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9463469 + 9463470.

It is an arithmetic number, because the mean of its divisors is an integer number (9463470).

Almost surely, 2^18926939 is an apocalyptic number.

18926939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18926939 is an equidigital number, since it uses as much as digits as its factorization.

18926939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 18926939 is about 4350.5101999651. The cubic root of 18926939 is about 266.4976972980.

The spelling of 18926939 in words is "eighteen million, nine hundred twenty-six thousand, nine hundred thirty-nine".