20326978 has 16 divisors (see below), whose sum is σ = 34977024. Its totient is φ = 8678880.

The previous prime is 20326973. The next prime is 20326987. The reversal of 20326978 is 87962302.

It is a super-2 number, since 2×20326978² = 826372069224968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20326973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (2186064).

Almost surely, 2^20326978 is an apocalyptic number.

20326978 is a deficient number, since it is larger than the sum of its proper divisors (14650046).

20326978 is a wasteful number, since it uses less digits than its factorization.

20326978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5457.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20326978 is about 4508.5449981119. The cubic root of 20326978 is about 272.9130307488.

The spelling of 20326978 in words is "twenty million, three hundred twenty-six thousand, nine hundred seventy-eight".