20378449002 has 16 divisors (see below), whose sum is σ = 42162308640. Its totient is φ = 6558581232.

The previous prime is 20378449001. The next prime is 20378449009. The reversal of 20378449002 is 20094487302.

It is a super-2 number, since 2×20378449002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20378449001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58558588 + ... + 58558935.

It is an arithmetic number, because the mean of its divisors is an integer number (2635144290).

Almost surely, 2^20378449002 is an apocalyptic number.

20378449002 is an abundant number, since it is smaller than the sum of its proper divisors (21783859638).

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

20378449002 is a wasteful number, since it uses less digits than its factorization.

20378449002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117117557.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 20378449002 in words is "twenty billion, three hundred seventy-eight million, four hundred forty-nine thousand, two".