20461678 has 4 divisors (see below), whose sum is σ = 30692520. Its totient is φ = 10230838.

The previous prime is 20461673. The next prime is 20461699. The reversal of 20461678 is 87616402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115418 + ... + 5115421.

It is an arithmetic number, because the mean of its divisors is an integer number (7673130).

Almost surely, 2^20461678 is an apocalyptic number.

20461678 is a deficient number, since it is larger than the sum of its proper divisors (10230842).

20461678 is a wasteful number, since it uses less digits than its factorization.

20461678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230841.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20461678 is about 4523.4586325068. The cubic root of 20461678 is about 273.5145381170.

The spelling of 20461678 in words is "twenty million, four hundred sixty-one thousand, six hundred seventy-eight".