20725654 has 4 divisors (see below), whose sum is σ = 31088484. Its totient is φ = 10362826.

The previous prime is 20725631. The next prime is 20725667. The reversal of 20725654 is 45652702.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5181412 + ... + 5181415.

It is an arithmetic number, because the mean of its divisors is an integer number (7772121).

Almost surely, 2^20725654 is an apocalyptic number.

20725654 is a deficient number, since it is larger than the sum of its proper divisors (10362830).

20725654 is a wasteful number, since it uses less digits than its factorization.

20725654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362829.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 20725654 is about 4552.5436845790. The cubic root of 20725654 is about 274.6857192013.

The spelling of 20725654 in words is "twenty million, seven hundred twenty-five thousand, six hundred fifty-four".