20545607 has 2 divisors, whose sum is σ = 20545608. Its totient is φ = 20545606.

The previous prime is 20545597. The next prime is 20545663. The reversal of 20545607 is 70654502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20545607 - 2¹² = 20541511 is a prime.

It is equal to p_1302959 and since 20545607 and 1302959 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20545607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20545687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272803 + 10272804.

It is an arithmetic number, because the mean of its divisors is an integer number (10272804).

Almost surely, 2^20545607 is an apocalyptic number.

20545607 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545607 is an equidigital number, since it uses as much as digits as its factorization.

20545607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20545607 is about 4532.7262216022. The cubic root of 20545607 is about 273.8879921181.

The spelling of 20545607 in words is "twenty million, five hundred forty-five thousand, six hundred seven".