20717078 has 16 divisors (see below), whose sum is σ = 32255280. Its totient is φ = 9967776.

The previous prime is 20717063. The next prime is 20717093. The reversal of 20717078 is 87071702.

It is an interprime number because it is at equal distance from previous prime (20717063) and next prime (20717093).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31400 + ... + 32052.

It is an arithmetic number, because the mean of its divisors is an integer number (2015955).

Almost surely, 2^20717078 is an apocalyptic number.

20717078 is a deficient number, since it is larger than the sum of its proper divisors (11538202).

20717078 is a wasteful number, since it uses less digits than its factorization.

20717078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 20717078 is about 4551.6016961065. The cubic root of 20717078 is about 274.6478268752.

The spelling of 20717078 in words is "twenty million, seven hundred seventeen thousand, seventy-eight".