20011401 has 8 divisors (see below), whose sum is σ = 29646560. Its totient is φ = 13340916.

The previous prime is 20011373. The next prime is 20011423. The reversal of 20011401 is 10411002.

It is a happy number.

It is not a de Polignac number, because 20011401 - 2⁷ = 20011273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370555 + ... + 370608.

It is an arithmetic number, because the mean of its divisors is an integer number (3705820).

Almost surely, 2^20011401 is an apocalyptic number.

It is an amenable number.

20011401 is a deficient number, since it is larger than the sum of its proper divisors (9635159).

20011401 is an equidigital number, since it uses as much as digits as its factorization.

20011401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741172 (or 741166 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20011401 is about 4473.4104439454. The cubic root of 20011401 is about 271.4933303206.

Adding to 20011401 its reverse (10411002), we get a palindrome (30422403).

The spelling of 20011401 in words is "twenty million, eleven thousand, four hundred one".