20402350 has 24 divisors (see below), whose sum is σ = 38669400. Its totient is φ = 8005920.

The previous prime is 20402321. The next prime is 20402351. The reversal of 20402350 is 5320402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1200 + ... + 6499.

It is an arithmetic number, because the mean of its divisors is an integer number (1611225).

Almost surely, 2^20402350 is an apocalyptic number.

20402350 is a deficient number, since it is larger than the sum of its proper divisors (18267050).

20402350 is a wasteful number, since it uses less digits than its factorization.

20402350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764 (or 7759 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20402350 is about 4516.8960581355. The cubic root of 20402350 is about 273.2499332440.

Adding to 20402350 its reverse (5320402), we get a palindrome (25722752).

The spelling of 20402350 in words is "twenty million, four hundred two thousand, three hundred fifty".