20020407 has 32 divisors (see below), whose sum is σ = 31186944. Its totient is φ = 11289600.

The previous prime is 20020387. The next prime is 20020421. The reversal of 20020407 is 70402002.

It is not a de Polignac number, because 20020407 - 2⁷ = 20020279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71107 + ... + 71387.

It is an arithmetic number, because the mean of its divisors is an integer number (974592).

Almost surely, 2^20020407 is an apocalyptic number.

20020407 is a deficient number, since it is larger than the sum of its proper divisors (11166537).

20020407 is a wasteful number, since it uses less digits than its factorization.

20020407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 20020407 is about 4474.4169452567. The cubic root of 20020407 is about 271.5340521442.

Adding to 20020407 its reverse (70402002), we get a palindrome (90422409).

The spelling of 20020407 in words is "twenty million, twenty thousand, four hundred seven".