20481001 has 4 divisors (see below), whose sum is σ = 20595600. Its totient is φ = 20366404.

The previous prime is 20480969. The next prime is 20481007. The reversal of 20481001 is 10018402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20481001 - 2⁵ = 20480969 is a prime.

It is a super-3 number, since 3×20481001³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20481007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57031 + ... + 57388.

It is an arithmetic number, because the mean of its divisors is an integer number (5148900).

Almost surely, 2^20481001 is an apocalyptic number.

It is an amenable number.

20481001 is a deficient number, since it is larger than the sum of its proper divisors (114599).

20481001 is a wasteful number, since it uses less digits than its factorization.

20481001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114598.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20481001 is about 4525.5939941625. The cubic root of 20481001 is about 273.6006089111.

Adding to 20481001 its reverse (10018402), we get a palindrome (30499403).

The spelling of 20481001 in words is "twenty million, four hundred eighty-one thousand, one".