20697800312 has 48 divisors (see below), whose sum is σ = 45231203160. Its totient is φ = 8853437376.

The previous prime is 20697800267. The next prime is 20697800323. The reversal of 20697800312 is 21300879602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154538 + ... + 255494.

Almost surely, 2^20697800312 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 20697800312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22615601580).

20697800312 is an abundant number, since it is smaller than the sum of its proper divisors (24533402848).

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

20697800312 is a wasteful number, since it uses less digits than its factorization.

20697800312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101500 (or 101489 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 20697800312 in words is "twenty billion, six hundred ninety-seven million, eight hundred thousand, three hundred twelve".