20668252212 has 36 divisors (see below), whose sum is σ = 54994474080. Its totient is φ = 6526816272.

The previous prime is 20668252211. The next prime is 20668252223. The reversal of 20668252212 is 21225286602.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20668252211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15107688 + ... + 15109055.

It is an arithmetic number, because the mean of its divisors is an integer number (1527624280).

Almost surely, 2^20668252212 is an apocalyptic number.

It is an amenable number.

20668252212 is an abundant number, since it is smaller than the sum of its proper divisors (34326221868).

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

20668252212 is a wasteful number, since it uses less digits than its factorization.

20668252212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30216772 (or 30216767 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 20668252212 in words is "twenty billion, six hundred sixty-eight million, two hundred fifty-two thousand, two hundred twelve".