20654654 has 4 divisors (see below), whose sum is σ = 30981984. Its totient is φ = 10327326.

The previous prime is 20654617. The next prime is 20654659. The reversal of 20654654 is 45645602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45645602 = 2 ⋅22822801.

It is a super-2 number, since 2×20654654² = 853229463719432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20654654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5163662 + ... + 5163665.

It is an arithmetic number, because the mean of its divisors is an integer number (7745496).

Almost surely, 2^20654654 is an apocalyptic number.

20654654 is a deficient number, since it is larger than the sum of its proper divisors (10327330).

20654654 is a wasteful number, since it uses less digits than its factorization.

20654654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327329.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 20654654 is about 4544.7391564313. The cubic root of 20654654 is about 274.3716961601.

The spelling of 20654654 in words is "twenty million, six hundred fifty-four thousand, six hundred fifty-four".