20231436 has 12 divisors (see below), whose sum is σ = 47206712. Its totient is φ = 6743808.

The previous prime is 20231429. The next prime is 20231461. The reversal of 20231436 is 63413202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20231436² = 818622005244192, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 842965 + ... + 842988.

Almost surely, 2^20231436 is an apocalyptic number.

It is an amenable number.

20231436 is an abundant number, since it is smaller than the sum of its proper divisors (26975276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20231436 is a wasteful number, since it uses less digits than its factorization.

20231436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685960 (or 1685958 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20231436 is about 4497.9368603839. The cubic root of 20231436 is about 272.4847720357.

Adding to 20231436 its reverse (63413202), we get a palindrome (83644638).

The spelling of 20231436 in words is "twenty million, two hundred thirty-one thousand, four hundred thirty-six".