20402440104 has 32 divisors (see below), whose sum is σ = 51056712000. Its totient is φ = 6794065152.

The previous prime is 20402440067. The next prime is 20402440127. The reversal of 20402440104 is 40104420402.

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, 397044 + ... + 445475.

It is an arithmetic number, because the mean of its divisors is an integer number (1595522250).

Almost surely, 2^20402440104 is an apocalyptic number.

20402440104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20402440104 is an abundant number, since it is smaller than the sum of its proper divisors (30654271896).

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

20402440104 is a wasteful number, since it uses less digits than its factorization.

20402440104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843537 (or 843533 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20402440104 its reverse (40104420402), we get a palindrome (60506860506).

The spelling of 20402440104 in words is "twenty billion, four hundred two million, four hundred forty thousand, one hundred four".