20011631796 has 96 divisors (see below), whose sum is σ = 55910426880. Its totient is φ = 6153293952.

The previous prime is 20011631791. The next prime is 20011631797. The reversal of 20011631796 is 69713611002.

20011631796 is a `hidden beast` number, since 2 + 0 + 0 + 11 + 631 + 7 + 9 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20011631796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011631791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2589330 + ... + 2597046.

It is an arithmetic number, because the mean of its divisors is an integer number (582400280).

Almost surely, 2^20011631796 is an apocalyptic number.

20011631796 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011631796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27955213440).

20011631796 is an abundant number, since it is smaller than the sum of its proper divisors (35898795084).

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

20011631796 is a wasteful number, since it uses less digits than its factorization.

20011631796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9590 (or 9582 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 20011631796 in words is "twenty billion, eleven million, six hundred thirty-one thousand, seven hundred ninety-six".