20436342 has 16 divisors (see below), whose sum is σ = 41543472. Its totient is φ = 6700320.

The previous prime is 20436331. The next prime is 20436359. The reversal of 20436342 is 24363402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27553 + ... + 28284.

It is an arithmetic number, because the mean of its divisors is an integer number (2596467).

Almost surely, 2^20436342 is an apocalyptic number.

20436342 is an abundant number, since it is smaller than the sum of its proper divisors (21107130).

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

20436342 is a wasteful number, since it uses less digits than its factorization.

20436342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55903.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 20436342 is about 4520.6572530994. The cubic root of 20436342 is about 273.4016013628.

Adding to 20436342 its reverse (24363402), we get a palindrome (44799744).

It can be divided in two parts, 2043 and 6342, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 20436342 in words is "twenty million, four hundred thirty-six thousand, three hundred forty-two".