20671207700 has 144 divisors (see below), whose sum is σ = 55472907840. Its totient is φ = 6573312000.

The previous prime is 20671207691. The next prime is 20671207709. The reversal of 20671207700 is 770217602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20671207691) and next prime (20671207709).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671207709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233660 + ... + 309740.

Almost surely, 2^20671207700 is an apocalyptic number.

20671207700 is a gapful number since it is divisible by the number (20) 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 20671207700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27736453920).

20671207700 is an abundant number, since it is smaller than the sum of its proper divisors (34801700140).

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

20671207700 is a wasteful number, since it uses less digits than its factorization.

20671207700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76138 (or 76131 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 32.

The spelling of 20671207700 in words is "twenty billion, six hundred seventy-one million, two hundred seven thousand, seven hundred".