20547901 has 16 divisors (see below), whose sum is σ = 23557248. Its totient is φ = 17740800.

The previous prime is 20547887. The next prime is 20547931. The reversal of 20547901 is 10974502.

It is a happy number.

It is not a de Polignac number, because 20547901 - 2⁵ = 20547869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20547901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547931) 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 15 ways as a sum of consecutive naturals, for example, 60805 + ... + 61141.

It is an arithmetic number, because the mean of its divisors is an integer number (1472328).

Almost surely, 2^20547901 is an apocalyptic number.

It is an amenable number.

20547901 is a deficient number, since it is larger than the sum of its proper divisors (3009347).

20547901 is a wasteful number, since it uses less digits than its factorization.

20547901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20547901 is about 4532.9792631337. The cubic root of 20547901 is about 273.8981853056.

The spelling of 20547901 in words is "twenty million, five hundred forty-seven thousand, nine hundred one".