20004220040 has 64 divisors (see below), whose sum is σ = 51479314560. Its totient is φ = 6853271040.

The previous prime is 20004220037. The next prime is 20004220057. The reversal of 20004220040 is 4002240002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20004219997 and 20004220024.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342839 + ... + 396921.

It is an arithmetic number, because the mean of its divisors is an integer number (804364290).

Almost surely, 2^20004220040 is an apocalyptic number.

20004220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004220040 is an abundant number, since it is smaller than the sum of its proper divisors (31475094520).

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

20004220040 is a wasteful number, since it uses less digits than its factorization.

20004220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55422 (or 55418 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20004220040 its reverse (4002240002), we get a palindrome (24006460042).

The spelling of 20004220040 in words is "twenty billion, four million, two hundred twenty thousand, forty".