20210612550 has 192 divisors, whose sum is σ = 53594784000. Its totient is φ = 5025922560.

The previous prime is 20210612549. The next prime is 20210612557. The reversal of 20210612550 is 5521601202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20210612550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210612557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 88255836 + ... + 88256064.

It is an arithmetic number, because the mean of its divisors is an integer number (279139500).

Almost surely, 2^20210612550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210612550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26797392000).

20210612550 is an abundant number, since it is smaller than the sum of its proper divisors (33384171450).

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

20210612550 is a wasteful number, since it uses less digits than its factorization.

20210612550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 20210612550 in words is "twenty billion, two hundred ten million, six hundred twelve thousand, five hundred fifty".