20379902550 has 384 divisors, whose sum is σ = 62815027200. Its totient is φ = 4269957120.

The previous prime is 20379902519. The next prime is 20379902563. The reversal of 20379902550 is 5520997302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 105595254 + ... + 105595446.

It is an arithmetic number, because the mean of its divisors is an integer number (163580800).

Almost surely, 2^20379902550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20379902550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31407513600).

20379902550 is an abundant number, since it is smaller than the sum of its proper divisors (42435124650).

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

20379902550 is a wasteful number, since it uses less digits than its factorization.

20379902550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The spelling of 20379902550 in words is "twenty billion, three hundred seventy-nine million, nine hundred two thousand, five hundred fifty".