20540004 has 24 divisors (see below), whose sum is σ = 49580160. Its totient is φ = 6610464.

The previous prime is 20539997. The next prime is 20540017. The reversal of 20540004 is 40004502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29164 + ... + 29859.

It is an arithmetic number, because the mean of its divisors is an integer number (2065840).

Almost surely, 2^20540004 is an apocalyptic number.

It is an amenable number.

20540004 is an abundant number, since it is smaller than the sum of its proper divisors (29040156).

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

20540004 is a wasteful number, since it uses less digits than its factorization.

20540004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59059 (or 59057 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20540004 is about 4532.1081187456. The cubic root of 20540004 is about 273.8630924897.

Adding to 20540004 its reverse (40004502), we get a palindrome (60544506).

The spelling of 20540004 in words is "twenty million, five hundred forty thousand, four".