20313545 has 16 divisors (see below), whose sum is σ = 27955200. Its totient is φ = 13881024.

The previous prime is 20313511. The next prime is 20313563. The reversal of 20313545 is 54531302.

It is a cyclic number.

It is not a de Polignac number, because 20313545 - 2¹⁶ = 20248009 is a prime.

It is a super-2 number, since 2×20313545² = 825280220934050, 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 20313545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11384 + ... + 13046.

It is an arithmetic number, because the mean of its divisors is an integer number (1747200).

Almost surely, 2^20313545 is an apocalyptic number.

It is an amenable number.

20313545 is a deficient number, since it is larger than the sum of its proper divisors (7641655).

20313545 is a wasteful number, since it uses less digits than its factorization.

20313545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20313545 is about 4507.0550251800. The cubic root of 20313545 is about 272.8528996822.

Adding to 20313545 its reverse (54531302), we get a palindrome (74844847).

The spelling of 20313545 in words is "twenty million, three hundred thirteen thousand, five hundred forty-five".