20486401 has 8 divisors (see below), whose sum is σ = 22121960. Its totient is φ = 18859392.

The previous prime is 20486387. The next prime is 20486437. The reversal of 20486401 is 10468402.

20486401 = 3200² + 3201².

It can be written as a sum of positive squares in 4 ways, for example, as 10246401 + 10240000 = 3201^2 + 3200^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20486401 - 2¹³ = 20478209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20481401) 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, 3391 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (2765245).

Almost surely, 2^20486401 is an apocalyptic number.

20486401 is the 3201-st centered square number.

It is an amenable number.

20486401 is a deficient number, since it is larger than the sum of its proper divisors (1635559).

20486401 is a wasteful number, since it uses less digits than its factorization.

20486401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20486401 is about 4526.1905616092. The cubic root of 20486401 is about 273.6246525513.

The spelling of 20486401 in words is "twenty million, four hundred eighty-six thousand, four hundred one".