20701312 has 16 divisors (see below), whose sum is σ = 41241150. Its totient is φ = 10350592.

The previous prime is 20701309. The next prime is 20701319. The reversal of 20701312 is 21310702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17106496 + 3594816 = 4136^2 + 1896^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20701319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80737 + ... + 80992.

Almost surely, 2^20701312 is an apocalyptic number.

It is an amenable number.

20701312 is a deficient number, since it is larger than the sum of its proper divisors (20539838).

20701312 is an equidigital number, since it uses as much as digits as its factorization.

20701312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161743 (or 161731 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20701312 is about 4549.8694486765. The cubic root of 20701312 is about 274.5781388538.

It can be divided in two parts, 207013 and 12, that added together give a square (207025 = 455²).

The spelling of 20701312 in words is "twenty million, seven hundred one thousand, three hundred twelve".