20156900652 has 192 divisors, whose sum is σ = 63223014400. Its totient is φ = 5425159680.

The previous prime is 20156900651. The next prime is 20156900713. The reversal of 20156900652 is 25600965102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20156900651) 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 63 ways as a sum of consecutive naturals, for example, 2596008 + ... + 2603760.

Almost surely, 2^20156900652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20156900652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31611507200).

20156900652 is an abundant number, since it is smaller than the sum of its proper divisors (43066113748).

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

20156900652 is a wasteful number, since it uses less digits than its factorization.

20156900652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 20156900652 in words is "twenty billion, one hundred fifty-six million, nine hundred thousand, six hundred fifty-two".