20692042812 has 144 divisors (see below), whose sum is σ = 64418135040. Its totient is φ = 5721256800.

The previous prime is 20692042783. The next prime is 20692042831. The reversal of 20692042812 is 21824029602.

20692042812 is a `hidden beast` number, since 206 + 9 + 20 + 428 + 1 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100987 + ... + 227117.

It is an arithmetic number, because the mean of its divisors is an integer number (447348160).

Almost surely, 2^20692042812 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 20692042812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32209067520).

20692042812 is an abundant number, since it is smaller than the sum of its proper divisors (43726092228).

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

20692042812 is a wasteful number, since it uses less digits than its factorization.

20692042812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126189 (or 126174 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 20692042812 in words is "twenty billion, six hundred ninety-two million, forty-two thousand, eight hundred twelve".