20898429 has 8 divisors (see below), whose sum is σ = 28020960. Its totient is φ = 13854096.

The previous prime is 20898413. The next prime is 20898443. The reversal of 20898429 is 92489802.

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

It is not a de Polignac number, because 20898429 - 2⁴ = 20898413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20898529) 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, 18922 + ... + 19995.

It is an arithmetic number, because the mean of its divisors is an integer number (3502620).

Almost surely, 2^20898429 is an apocalyptic number.

It is an amenable number.

20898429 is a deficient number, since it is larger than the sum of its proper divisors (7122531).

20898429 is a wasteful number, since it uses less digits than its factorization.

20898429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39099.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 20898429 is about 4571.4799573005. The cubic root of 20898429 is about 275.4468943086.

The spelling of 20898429 in words is "twenty million, eight hundred ninety-eight thousand, four hundred twenty-nine".