20161078 has 16 divisors (see below), whose sum is σ = 35496864. Its totient is φ = 8406720.

The previous prime is 20161027. The next prime is 20161079. The reversal of 20161078 is 87016102.

It is a super-2 number, since 2×20161078² = 812938132244168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20161079) 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, 18943 + ... + 19978.

It is an arithmetic number, because the mean of its divisors is an integer number (2218554).

Almost surely, 2^20161078 is an apocalyptic number.

20161078 is a deficient number, since it is larger than the sum of its proper divisors (15335786).

20161078 is a wasteful number, since it uses less digits than its factorization.

20161078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38967.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 20161078 is about 4490.1089073652. The cubic root of 20161078 is about 272.1685356173.

The spelling of 20161078 in words is "twenty million, one hundred sixty-one thousand, seventy-eight".