20654513 has 4 divisors (see below), whose sum is σ = 22532208. Its totient is φ = 18776820.

The previous prime is 20654489. The next prime is 20654527. The reversal of 20654513 is 31545602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20654513 - 2¹⁰ = 20653489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20654563) 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 in 3 ways as a sum of consecutive naturals, for example, 938831 + ... + 938852.

It is an arithmetic number, because the mean of its divisors is an integer number (5633052).

Almost surely, 2^20654513 is an apocalyptic number.

It is an amenable number.

20654513 is a deficient number, since it is larger than the sum of its proper divisors (1877695).

20654513 is a wasteful number, since it uses less digits than its factorization.

20654513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877694.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20654513 is about 4544.7236439634. The cubic root of 20654513 is about 274.3710718214.

The spelling of 20654513 in words is "twenty million, six hundred fifty-four thousand, five hundred thirteen".