20654457403 has 4 divisors (see below), whose sum is σ = 20654754120. Its totient is φ = 20654160688.

The previous prime is 20654457359. The next prime is 20654457409. The reversal of 20654457403 is 30475445602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20654457403 - 2⁹ = 20654456891 is a prime.

It is a super-2 number, since 2×20654457403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20654457409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18951 + ... + 204127.

It is an arithmetic number, because the mean of its divisors is an integer number (5163688530).

Almost surely, 2^20654457403 is an apocalyptic number.

20654457403 is a deficient number, since it is larger than the sum of its proper divisors (296717).

20654457403 is a wasteful number, since it uses less digits than its factorization.

20654457403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296716.

The product of its (nonzero) digits is 403200, while the sum is 40.

The spelling of 20654457403 in words is "twenty billion, six hundred fifty-four million, four hundred fifty-seven thousand, four hundred three".