20829430 has 16 divisors (see below), whose sum is σ = 37558080. Its totient is φ = 8317312.

The previous prime is 20829349. The next prime is 20829433. The reversal of 20829430 is 3492802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5742 + ... + 8638.

It is an arithmetic number, because the mean of its divisors is an integer number (2347380).

Almost surely, 2^20829430 is an apocalyptic number.

20829430 is a deficient number, since it is larger than the sum of its proper divisors (16728650).

20829430 is a wasteful number, since it uses less digits than its factorization.

20829430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20829430 is about 4563.9270371030. The cubic root of 20829430 is about 275.1434183043.

The spelling of 20829430 in words is "twenty million, eight hundred twenty-nine thousand, four hundred thirty".