20122650405 has 192 divisors, whose sum is σ = 42645657600. Its totient is φ = 8644147200.

The previous prime is 20122650367. The next prime is 20122650451. The reversal of 20122650405 is 50405622102.

20122650405 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 2 + 650 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 20122650405 - 2⁹ = 20122649893 is a prime.

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, 29722927 + ... + 29723603.

It is an arithmetic number, because the mean of its divisors is an integer number (222112800).

Almost surely, 2^20122650405 is an apocalyptic number.

It is an amenable number.

20122650405 is an abundant number, since it is smaller than the sum of its proper divisors (22523007195).

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

20122650405 is a wasteful number, since it uses less digits than its factorization.

20122650405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20122650405 in words is "twenty billion, one hundred twenty-two million, six hundred fifty thousand, four hundred five".