20477801 has 8 divisors (see below), whose sum is σ = 21715680. Its totient is φ = 19255968.

The previous prime is 20477783. The next prime is 20477803. The reversal of 20477801 is 10877402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20477801 - 2¹⁰ = 20476777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20477803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (2714460).

Almost surely, 2^20477801 is an apocalyptic number.

It is an amenable number.

20477801 is a deficient number, since it is larger than the sum of its proper divisors (1237879).

20477801 is a wasteful number, since it uses less digits than its factorization.

20477801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20477801 is about 4525.2404356012. The cubic root of 20477801 is about 273.5863588336.

The spelling of 20477801 in words is "twenty million, four hundred seventy-seven thousand, eight hundred one".