20407479624 has 144 divisors (see below), whose sum is σ = 64347491520. Its totient is φ = 5825856960.

The previous prime is 20407479623. The next prime is 20407479641. The reversal of 20407479624 is 42697470402.

It is a self number, because there is not a number n which added to its sum of digits gives 20407479624.

It is not an unprimeable number, because it can be changed into a prime (20407479623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8151957 + ... + 8154459.

It is an arithmetic number, because the mean of its divisors is an integer number (446857580).

Almost surely, 2^20407479624 is an apocalyptic number.

20407479624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20407479624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32173745760).

20407479624 is an abundant number, since it is smaller than the sum of its proper divisors (43940011896).

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

20407479624 is a wasteful number, since it uses less digits than its factorization.

20407479624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840 (or 4826 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 20407479624 in words is "twenty billion, four hundred seven million, four hundred seventy-nine thousand, six hundred twenty-four".