18969533 has 12 divisors (see below), whose sum is σ = 20977824. Its totient is φ = 17140200.

The previous prime is 18969527. The next prime is 18969539. The reversal of 18969533 is 33596981.

It is an interprime number because it is at equal distance from previous prime (18969527) and next prime (18969539).

It is not a de Polignac number, because 18969533 - 2¹⁴ = 18953149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25160 + ... + 25902.

It is an arithmetic number, because the mean of its divisors is an integer number (1748152).

Almost surely, 2^18969533 is an apocalyptic number.

It is an amenable number.

18969533 is a deficient number, since it is larger than the sum of its proper divisors (2008291).

18969533 is a wasteful number, since it uses less digits than its factorization.

18969533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 965 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 18969533 is about 4355.4027368316. The cubic root of 18969533 is about 266.6974601592.

The spelling of 18969533 in words is "eighteen million, nine hundred sixty-nine thousand, five hundred thirty-three".