20429355 has 8 divisors (see below), whose sum is σ = 32686992. Its totient is φ = 10895648.

The previous prime is 20429333. The next prime is 20429363. The reversal of 20429355 is 55392402.

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 20429355 - 2⁵ = 20429323 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680964 + ... + 680993.

It is an arithmetic number, because the mean of its divisors is an integer number (4085874).

Almost surely, 2^20429355 is an apocalyptic number.

20429355 is a deficient number, since it is larger than the sum of its proper divisors (12257637).

20429355 is a wasteful number, since it uses less digits than its factorization.

20429355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361965.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20429355 is about 4519.8844011766. The cubic root of 20429355 is about 273.3704399686.

The spelling of 20429355 in words is "twenty million, four hundred twenty-nine thousand, three hundred fifty-five".