18925053890 has 32 divisors (see below), whose sum is σ = 35555448960. Its totient is φ = 7239003904.

The previous prime is 18925053877. The next prime is 18925053899. The reversal of 18925053890 is 9835052981.

It is not an unprimeable number, because it can be changed into a prime (18925053899) 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, 1143857 + ... + 1160283.

It is an arithmetic number, because the mean of its divisors is an integer number (1111107780).

Almost surely, 2^18925053890 is an apocalyptic number.

18925053890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18925053890 is a deficient number, since it is larger than the sum of its proper divisors (16630395070).

18925053890 is a wasteful number, since it uses less digits than its factorization.

18925053890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21466.

The product of its (nonzero) digits is 777600, while the sum is 50.

Subtracting from 18925053890 its reverse (9835052981), we obtain a palindrome (9090000909).

The spelling of 18925053890 in words is "eighteen billion, nine hundred twenty-five million, fifty-three thousand, eight hundred ninety".