18969542 has 4 divisors (see below), whose sum is σ = 28454316. Its totient is φ = 9484770.

The previous prime is 18969541. The next prime is 18969553. The reversal of 18969542 is 24596981.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18969493 and 18969502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4742384 + ... + 4742387.

It is an arithmetic number, because the mean of its divisors is an integer number (7113579).

Almost surely, 2^18969542 is an apocalyptic number.

18969542 is a deficient number, since it is larger than the sum of its proper divisors (9484774).

18969542 is an equidigital number, since it uses as much as digits as its factorization.

18969542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484773.

The product of its digits is 155520, while the sum is 44.

The square root of 18969542 is about 4355.4037700310. The cubic root of 18969542 is about 266.6975023370.

The spelling of 18969542 in words is "eighteen million, nine hundred sixty-nine thousand, five hundred forty-two".