20040402 has 32 divisors (see below), whose sum is σ = 42393600. Its totient is φ = 6298128.

The previous prime is 20040373. The next prime is 20040403. The reversal of 20040402 is 20404002.

It is not an unprimeable number, because it can be changed into a prime (20040403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41599 + ... + 42077.

It is an arithmetic number, because the mean of its divisors is an integer number (1324800).

Almost surely, 2^20040402 is an apocalyptic number.

20040402 is an abundant number, since it is smaller than the sum of its proper divisors (22353198).

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

20040402 is a wasteful number, since it uses less digits than its factorization.

20040402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20040402 is about 4476.6507569834. The cubic root of 20040402 is about 271.6244185538.

Adding to 20040402 its reverse (20404002), we get a palindrome (40444404).

The spelling of 20040402 in words is "twenty million, forty thousand, four hundred two".