20379875550 has 48 divisors (see below), whose sum is σ = 50557573632. Its totient is φ = 5432968800.

The previous prime is 20379875543. The next prime is 20379875557. The reversal of 20379875550 is 5557897302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20379875543) and next prime (20379875557).

It is a junction number, because it is equal to n+sod(n) for n = 20379875493 and 20379875502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20379875557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 516627 + ... + 554673.

It is an arithmetic number, because the mean of its divisors is an integer number (1053282784).

Almost surely, 2^20379875550 is an apocalyptic number.

20379875550 is an abundant number, since it is smaller than the sum of its proper divisors (30177698082).

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

20379875550 is a wasteful number, since it uses less digits than its factorization.

20379875550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41633 (or 41628 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 51.

The spelling of 20379875550 in words is "twenty billion, three hundred seventy-nine million, eight hundred seventy-five thousand, five hundred fifty".