20666211702 has 16 divisors (see below), whose sum is σ = 41335018032. Its totient is φ = 6888304800.

The previous prime is 20666211701. The next prime is 20666211703. The reversal of 20666211702 is 20711266602.

It is an interprime number because it is at equal distance from previous prime (20666211701) and next prime (20666211703).

It is a super-2 number, since 2×20666211702² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20666211701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4452 + ... + 203352.

It is an arithmetic number, because the mean of its divisors is an integer number (2583438627).

Almost surely, 2^20666211702 is an apocalyptic number.

20666211702 is an abundant number, since it is smaller than the sum of its proper divisors (20668806330).

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

20666211702 is a wasteful number, since it uses less digits than its factorization.

20666211702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216223.

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 20666211702 in words is "twenty billion, six hundred sixty-six million, two hundred eleven thousand, seven hundred two".