20435401 has 24 divisors (see below), whose sum is σ = 25054920. Its totient is φ = 16595712.

The previous prime is 20435399. The next prime is 20435407. The reversal of 20435401 is 10453402.

It can be written as a sum of positive squares in 4 ways, for example, as 9703225 + 10732176 = 3115^2 + 3276^2 .

It is not a de Polignac number, because 20435401 - 2¹ = 20435399 is a prime.

It is a super-2 number, since 2×20435401² = 835211228061602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20435407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103635 + ... + 103831.

It is an arithmetic number, because the mean of its divisors is an integer number (1043955).

Almost surely, 2^20435401 is an apocalyptic number.

It is an amenable number.

20435401 is a deficient number, since it is larger than the sum of its proper divisors (4619519).

20435401 is a wasteful number, since it uses less digits than its factorization.

20435401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20435401 is about 4520.5531741149. The cubic root of 20435401 is about 273.3974050010.

Adding to 20435401 its reverse (10453402), we get a palindrome (30888803).

The spelling of 20435401 in words is "twenty million, four hundred thirty-five thousand, four hundred one".