20812434 has 8 divisors (see below), whose sum is σ = 41624880. Its totient is φ = 6937476.

The previous prime is 20812433. The next prime is 20812483. The reversal of 20812434 is 43421802.

It is a sphenic number, since it is the product of 3 distinct primes.

20812434 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20812433) 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, 1734364 + ... + 1734375.

It is an arithmetic number, because the mean of its divisors is an integer number (5203110).

Almost surely, 2^20812434 is an apocalyptic number.

20812434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20812434 is a wasteful number, since it uses less digits than its factorization.

20812434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468744.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20812434 is about 4562.0646641625. The cubic root of 20812434 is about 275.0685625190.

The spelling of 20812434 in words is "twenty million, eight hundred twelve thousand, four hundred thirty-four".