20069436 has 12 divisors (see below), whose sum is σ = 46828712. Its totient is φ = 6689808.

The previous prime is 20069417. The next prime is 20069437. The reversal of 20069436 is 63496002.

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

It is a super-2 number, since 2×20069436² = 805564522716192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20069437) 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, 836215 + ... + 836238.

Almost surely, 2^20069436 is an apocalyptic number.

It is an amenable number.

20069436 is an abundant number, since it is smaller than the sum of its proper divisors (26759276).

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

20069436 is a wasteful number, since it uses less digits than its factorization.

20069436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672460 (or 1672458 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20069436 is about 4479.8924094224. The cubic root of 20069436 is about 271.7555293290.

The spelling of 20069436 in words is "twenty million, sixty-nine thousand, four hundred thirty-six".