18961795 has 16 divisors (see below), whose sum is σ = 23677920. Its totient is φ = 14560000.

The previous prime is 18961793. The next prime is 18961807. The reversal of 18961795 is 59716981.

It is a happy number.

It is not a de Polignac number, because 18961795 - 2¹ = 18961793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18961793) 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, 36135 + ... + 36655.

It is an arithmetic number, because the mean of its divisors is an integer number (1479870).

Almost surely, 2^18961795 is an apocalyptic number.

18961795 is a deficient number, since it is larger than the sum of its proper divisors (4716125).

18961795 is a wasteful number, since it uses less digits than its factorization.

18961795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806.

The product of its digits is 136080, while the sum is 46.

The square root of 18961795 is about 4354.5143242387. The cubic root of 18961795 is about 266.6611917279.

The spelling of 18961795 in words is "eighteen million, nine hundred sixty-one thousand, seven hundred ninety-five".