20402150 has 48 divisors (see below), whose sum is σ = 40202784. Its totient is φ = 7687680.

The previous prime is 20402149. The next prime is 20402153. The reversal of 20402150 is 5120402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129872 + ... + 130028.

It is an arithmetic number, because the mean of its divisors is an integer number (837558).

Almost surely, 2^20402150 is an apocalyptic number.

20402150 is a deficient number, since it is larger than the sum of its proper divisors (19800634).

20402150 is a wasteful number, since it uses less digits than its factorization.

20402150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20402150 is about 4516.8739189842. The cubic root of 20402150 is about 273.2490403703.

Adding to 20402150 its reverse (5120402), we get a palindrome (25522552).

The spelling of 20402150 in words is "twenty million, four hundred two thousand, one hundred fifty".