20404240030 has 64 divisors (see below), whose sum is σ = 39969135360. Its totient is φ = 7474166784.

The previous prime is 20404240009. The next prime is 20404240037. The reversal of 20404240030 is 3004240402.

It is a super-2 number, since 2×20404240030² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404240037) 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, 779617 + ... + 805363.

It is an arithmetic number, because the mean of its divisors is an integer number (624517740).

Almost surely, 2^20404240030 is an apocalyptic number.

20404240030 is a deficient number, since it is larger than the sum of its proper divisors (19564895330).

20404240030 is a wasteful number, since it uses less digits than its factorization.

20404240030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25913.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20404240030 its reverse (3004240402), we get a palindrome (23408480432).

The spelling of 20404240030 in words is "twenty billion, four hundred four million, two hundred forty thousand, thirty".