20464146 has 12 divisors (see below), whose sum is σ = 44339022. Its totient is φ = 6821376.

The previous prime is 20464133. The next prime is 20464151. The reversal of 20464146 is 64146402.

It can be written as a sum of positive squares in only one way, i.e., 16719921 + 3744225 = 4089^2 + 1935^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568431 + ... + 568466.

Almost surely, 2^20464146 is an apocalyptic number.

20464146 is an abundant number, since it is smaller than the sum of its proper divisors (23874876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20464146 is a wasteful number, since it uses less digits than its factorization.

20464146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136905 (or 1136902 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20464146 is about 4523.7314243885. The cubic root of 20464146 is about 273.5255343924.

It can be divided in two parts, 20 and 464146, that added together give a triangular number (464166 = T₉₆₃).

The spelling of 20464146 in words is "twenty million, four hundred sixty-four thousand, one hundred forty-six".