20000436 has 48 divisors (see below), whose sum is σ = 48121920. Its totient is φ = 6462720.

The previous prime is 20000429. The next prime is 20000443. The reversal of 20000436 is 63400002.

It is an interprime number because it is at equal distance from previous prime (20000429) and next prime (20000443).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64995 + ... + 65301.

It is an arithmetic number, because the mean of its divisors is an integer number (1002540).

Almost surely, 2^20000436 is an apocalyptic number.

It is an amenable number.

20000436 is an abundant number, since it is smaller than the sum of its proper divisors (28121484).

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

20000436 is a wasteful number, since it uses less digits than its factorization.

20000436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20000436 is about 4472.1847010158. The cubic root of 20000436 is about 271.4437341220.

Adding to 20000436 its reverse (63400002), we get a palindrome (83400438).

The spelling of 20000436 in words is "twenty million, four hundred thirty-six", and thus it is an aban number.