20402435 has 8 divisors (see below), whose sum is σ = 24572976. Its totient is φ = 16261920.

The previous prime is 20402419. The next prime is 20402441. The reversal of 20402435 is 53420402.

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

It is not a de Polignac number, because 20402435 - 2⁴ = 20402419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5981 + ... + 8750.

It is an arithmetic number, because the mean of its divisors is an integer number (3071622).

Almost surely, 2^20402435 is an apocalyptic number.

20402435 is a deficient number, since it is larger than the sum of its proper divisors (4170541).

20402435 is a wasteful number, since it uses less digits than its factorization.

20402435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15013.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20402435 is about 4516.9054672419. The cubic root of 20402435 is about 273.2503127135.

Adding to 20402435 its reverse (53420402), we get a palindrome (73822837).

The spelling of 20402435 in words is "twenty million, four hundred two thousand, four hundred thirty-five".