20401485 has 16 divisors (see below), whose sum is σ = 35153664. Its totient is φ = 10043712.

The previous prime is 20401481. The next prime is 20401487. The reversal of 20401485 is 58410402.

It is not a de Polignac number, because 20401485 - 2² = 20401481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52117 + ... + 52506.

It is an arithmetic number, because the mean of its divisors is an integer number (2197104).

Almost surely, 2^20401485 is an apocalyptic number.

It is an amenable number.

20401485 is a deficient number, since it is larger than the sum of its proper divisors (14752179).

20401485 is a wasteful number, since it uses less digits than its factorization.

20401485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104644.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20401485 is about 4516.8003055260. The cubic root of 20401485 is about 273.2460715233.

Adding to 20401485 its reverse (58410402), we get a palindrome (78811887).

The spelling of 20401485 in words is "twenty million, four hundred one thousand, four hundred eighty-five".