20398629 has 8 divisors (see below), whose sum is σ = 28136160. Its totient is φ = 13130096.

The previous prime is 20398627. The next prime is 20398643. The reversal of 20398629 is 92689302.

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

It is a cyclic number.

It is not a de Polignac number, because 20398629 - 2¹ = 20398627 is a prime.

It is a super-2 number, since 2×20398629² = 832208130159282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20398627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117147 + ... + 117320.

It is an arithmetic number, because the mean of its divisors is an integer number (3517020).

Almost surely, 2^20398629 is an apocalyptic number.

20398629 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20398629 is a deficient number, since it is larger than the sum of its proper divisors (7737531).

20398629 is a wasteful number, since it uses less digits than its factorization.

20398629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234499.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 20398629 is about 4516.4841414534. The cubic root of 20398629 is about 273.2333203731.

The spelling of 20398629 in words is "twenty million, three hundred ninety-eight thousand, six hundred twenty-nine".