20694666649602 has 128 divisors (see below), whose sum is σ = 47884181667840. Its totient is φ = 5896598653440.

The previous prime is 20694666649567. The next prime is 20694666649637.

20694666649602 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (20694666649567) and next prime (20694666649637).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1605102268 + ... + 1605115160.

It is an arithmetic number, because the mean of its divisors is an integer number (374095169280).

Almost surely, 2^{20694666649602} is an apocalyptic number.

20694666649602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20694666649602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23942090833920).

20694666649602 is an abundant number, since it is smaller than the sum of its proper divisors (27189515018238).

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

20694666649602 is a wasteful number, since it uses less digits than its factorization.

20694666649602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22408.

The product of its (nonzero) digits is 241864704, while the sum is 66.

The spelling of 20694666649602 in words is "twenty trillion, six hundred ninety-four billion, six hundred sixty-six million, six hundred forty-nine thousand, six hundred two".