20654428 has 6 divisors (see below), whose sum is σ = 36145256. Its totient is φ = 10327212.

The previous prime is 20654419. The next prime is 20654429. The reversal of 20654428 is 82445602.

It is a self number, because there is not a number n which added to its sum of digits gives 20654428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581800 + ... + 2581807.

Almost surely, 2^20654428 is an apocalyptic number.

It is an amenable number.

20654428 is a deficient number, since it is larger than the sum of its proper divisors (15490828).

20654428 is a wasteful number, since it uses less digits than its factorization.

20654428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163611 (or 5163609 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20654428 is about 4544.7142924501. The cubic root of 20654428 is about 274.3706954457.

The spelling of 20654428 in words is "twenty million, six hundred fifty-four thousand, four hundred twenty-eight".