18825898 has 32 divisors (see below), whose sum is σ = 35481600. Its totient is φ = 7444080.

The previous prime is 18825887. The next prime is 18825899. The reversal of 18825898 is 89852881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (18825899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7863 + ... + 9973.

It is an arithmetic number, because the mean of its divisors is an integer number (1108800).

Almost surely, 2^18825898 is an apocalyptic number.

18825898 is a deficient number, since it is larger than the sum of its proper divisors (16655702).

18825898 is a wasteful number, since it uses less digits than its factorization.

18825898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147 (or 2133 counting only the distinct ones).

The product of its digits is 368640, while the sum is 49.

The square root of 18825898 is about 4338.8821140934. The cubic root of 18825898 is about 266.0226204217.

It can be divided in two parts, 188258 and 98, that added together give a square (188356 = 434²).

The spelling of 18825898 in words is "eighteen million, eight hundred twenty-five thousand, eight hundred ninety-eight".