20355611562 has 192 divisors, whose sum is σ = 52999704576. Its totient is φ = 5565127680.

The previous prime is 20355611557. The next prime is 20355611581. The reversal of 20355611562 is 26511655302.

20355611562 is a `hidden beast` number, since 2 + 0 + 35 + 5 + 61 + 1 + 562 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23863128 + ... + 23863980.

It is an arithmetic number, because the mean of its divisors is an integer number (276040128).

Almost surely, 2^20355611562 is an apocalyptic number.

20355611562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20355611562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26499852288).

20355611562 is an abundant number, since it is smaller than the sum of its proper divisors (32644093014).

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

20355611562 is a wasteful number, since it uses less digits than its factorization.

20355611562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 20355611562 in words is "twenty billion, three hundred fifty-five million, six hundred eleven thousand, five hundred sixty-two".