18951941 has 4 divisors (see below), whose sum is σ = 19072812. Its totient is φ = 18831072.

The previous prime is 18951929. The next prime is 18951953. The reversal of 18951941 is 14915981.

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

It is an interprime number because it is at equal distance from previous prime (18951929) and next prime (18951953).

It can be written as a sum of positive squares in 2 ways, for example, as 7756225 + 11195716 = 2785^2 + 3346^2 .

It is a cyclic number.

It is not a de Polignac number, because 18951941 - 2¹⁴ = 18935557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18951895 and 18951904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18950941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60200 + ... + 60513.

It is an arithmetic number, because the mean of its divisors is an integer number (4768203).

Almost surely, 2^18951941 is an apocalyptic number.

It is an amenable number.

18951941 is a deficient number, since it is larger than the sum of its proper divisors (120871).

18951941 is a wasteful number, since it uses less digits than its factorization.

18951941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120870.

The product of its digits is 12960, while the sum is 38.

The square root of 18951941 is about 4353.3827077343. The cubic root of 18951941 is about 266.6149912021.

The spelling of 18951941 in words is "eighteen million, nine hundred fifty-one thousand, nine hundred forty-one".