20340402 has 16 divisors (see below), whose sum is σ = 41993472. Its totient is φ = 6561360.

The previous prime is 20340401. The next prime is 20340403. The reversal of 20340402 is 20404302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20340401) and next prime (20340403).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (20340401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54493 + ... + 54864.

It is an arithmetic number, because the mean of its divisors is an integer number (2624592).

Almost surely, 2^20340402 is an apocalyptic number.

20340402 is an abundant number, since it is smaller than the sum of its proper divisors (21653070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20340402 is a wasteful number, since it uses less digits than its factorization.

20340402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109393.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20340402 is about 4510.0334810287. The cubic root of 20340402 is about 272.9730950689.

Adding to 20340402 its reverse (20404302), we get a palindrome (40744704).

The spelling of 20340402 in words is "twenty million, three hundred forty thousand, four hundred two".