20464081 has 8 divisors (see below), whose sum is σ = 22608000. Its totient is φ = 18367440.

The previous prime is 20464063. The next prime is 20464099. The reversal of 20464081 is 18046402.

It is an interprime number because it is at equal distance from previous prime (20464063) and next prime (20464099).

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 20464081 - 2⁷ = 20463953 is a prime.

It is a super-2 number, since 2×20464081² = 837557222349122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20468081) 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, 10906 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (2826000).

Almost surely, 2^20464081 is an apocalyptic number.

It is an amenable number.

20464081 is a deficient number, since it is larger than the sum of its proper divisors (2143919).

20464081 is a wasteful number, since it uses less digits than its factorization.

20464081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23639.

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

The square root of 20464081 is about 4523.7242400482. The cubic root of 20464081 is about 273.5252447936.

The spelling of 20464081 in words is "twenty million, four hundred sixty-four thousand, eighty-one".