18869772 has 24 divisors (see below), whose sum is σ = 44107056. Its totient is φ = 6278848.

The previous prime is 18869761. The next prime is 18869783. The reversal of 18869772 is 27796881.

It is an interprime number because it is at equal distance from previous prime (18869761) and next prime (18869783).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8578 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (1837794).

Almost surely, 2^18869772 is an apocalyptic number.

18869772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18869772 is an abundant number, since it is smaller than the sum of its proper divisors (25237284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18869772 is a wasteful number, since it uses less digits than its factorization.

18869772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777 (or 2775 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 18869772 is about 4343.9350823879. The cubic root of 18869772 is about 266.2291164823.

The spelling of 18869772 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred seventy-two".