20236434 has 16 divisors (see below), whose sum is σ = 40793088. Its totient is φ = 6692112.

The previous prime is 20236427. The next prime is 20236441. The reversal of 20236434 is 43463202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20236427) and next prime (20236441).

It is a super-2 number, since 2×20236434² = 819026522072712, which contains 22 as substring.

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, 12517 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (2549568).

Almost surely, 2^20236434 is an apocalyptic number.

20236434 is an abundant number, since it is smaller than the sum of its proper divisors (20556654).

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

20236434 is a wasteful number, since it uses less digits than its factorization.

20236434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26689.

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

The square root of 20236434 is about 4498.4924141316. The cubic root of 20236434 is about 272.5072085179.

Adding to 20236434 its reverse (43463202), we get a palindrome (63699636).

The spelling of 20236434 in words is "twenty million, two hundred thirty-six thousand, four hundred thirty-four".