20941994 has 8 divisors (see below), whose sum is σ = 33260868. Its totient is φ = 9855040.

The previous prime is 20941993. The next prime is 20942023. The reversal of 20941994 is 49914902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20566225 + 375769 = 4535^2 + 613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20941994² = 877134225392072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20941993) 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, 307937 + ... + 308004.

Almost surely, 2^20941994 is an apocalyptic number.

20941994 is a deficient number, since it is larger than the sum of its proper divisors (12318874).

20941994 is a wasteful number, since it uses less digits than its factorization.

20941994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615960.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 20941994 is about 4576.2423449813. The cubic root of 20941994 is about 275.6381609229.

The spelling of 20941994 in words is "twenty million, nine hundred forty-one thousand, nine hundred ninety-four".