18950531 has 2 divisors, whose sum is σ = 18950532. Its totient is φ = 18950530.

The previous prime is 18950527. The next prime is 18950537. The reversal of 18950531 is 13505981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18950531 - 2² = 18950527 is a prime.

It is a super-2 number, since 2×18950531² = 718245250363922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18950537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9475265 + 9475266.

It is an arithmetic number, because the mean of its divisors is an integer number (9475266).

Almost surely, 2^18950531 is an apocalyptic number.

18950531 is a deficient number, since it is larger than the sum of its proper divisors (1).

18950531 is an equidigital number, since it uses as much as digits as its factorization.

18950531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 18950531 is about 4353.2207616890. The cubic root of 18950531 is about 266.6083791008.

The spelling of 18950531 in words is "eighteen million, nine hundred fifty thousand, five hundred thirty-one".