20801461 has 4 divisors (see below), whose sum is σ = 20812672. Its totient is φ = 20790252.

The previous prime is 20801441. The next prime is 20801467. The reversal of 20801461 is 16410802.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20801461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801467) 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, 2085 + ... + 6778.

It is an arithmetic number, because the mean of its divisors is an integer number (5203168).

Almost surely, 2^20801461 is an apocalyptic number.

It is an amenable number.

20801461 is a deficient number, since it is larger than the sum of its proper divisors (11211).

20801461 is an equidigital number, since it uses as much as digits as its factorization.

20801461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11210.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20801461 is about 4560.8618703048. The cubic root of 20801461 is about 275.0202122885.

The spelling of 20801461 in words is "twenty million, eight hundred one thousand, four hundred sixty-one".