20942617950 has 144 divisors (see below), whose sum is σ = 60063120000. Its totient is φ = 5216097600.

The previous prime is 20942617939. The next prime is 20942617973. The reversal of 20942617950 is 5971624902.

20942617950 is a `hidden beast` number, since 2 + 0 + 9 + 426 + 179 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20942617896 and 20942617905.

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 71 ways as a sum of consecutive naturals, for example, 589801 + ... + 624299.

It is an arithmetic number, because the mean of its divisors is an integer number (417105000).

Almost surely, 2^20942617950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20942617950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30031560000).

20942617950 is an abundant number, since it is smaller than the sum of its proper divisors (39120502050).

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

20942617950 is a wasteful number, since it uses less digits than its factorization.

20942617950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34607 (or 34599 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 20942617950 in words is "twenty billion, nine hundred forty-two million, six hundred seventeen thousand, nine hundred fifty".