20212434 has 96 divisors (see below), whose sum is σ = 51217920. Its totient is φ = 5702400.

The previous prime is 20212421. The next prime is 20212453. The reversal of 20212434 is 43421202.

20212434 is a `hidden beast` number, since 20 + 212 + 434 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227062 + ... + 227150.

It is an arithmetic number, because the mean of its divisors is an integer number (533520).

Almost surely, 2^20212434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25608960).

20212434 is an abundant number, since it is smaller than the sum of its proper divisors (31005486).

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

20212434 is a wasteful number, since it uses less digits than its factorization.

20212434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20212434 is about 4495.8240623939. The cubic root of 20212434 is about 272.3994365621.

Adding to 20212434 its reverse (43421202), we get a palindrome (63633636).

The spelling of 20212434 in words is "twenty million, two hundred twelve thousand, four hundred thirty-four".