20267345 has 16 divisors (see below), whose sum is σ = 27889920. Its totient is φ = 13850304.

The previous prime is 20267329. The next prime is 20267381. The reversal of 20267345 is 54376202.

It is a cyclic number.

It is not a de Polignac number, because 20267345 - 2⁴ = 20267329 is a prime.

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, 11759 + ... + 13371.

It is an arithmetic number, because the mean of its divisors is an integer number (1743120).

Almost surely, 2^20267345 is an apocalyptic number.

It is an amenable number.

20267345 is a deficient number, since it is larger than the sum of its proper divisors (7622575).

20267345 is a wasteful number, since it uses less digits than its factorization.

20267345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 20267345 is about 4501.9268097116. The cubic root of 20267345 is about 272.6458888313.

The spelling of 20267345 in words is "twenty million, two hundred sixty-seven thousand, three hundred forty-five".