20120977216 has 14 divisors (see below), whose sum is σ = 39927564290. Its totient is φ = 10060488576.

The previous prime is 20120977207. The next prime is 20120977223. The reversal of 20120977216 is 61277902102.

It can be written as a sum of positive squares in only one way, i.e., 17529760000 + 2591217216 = 132400^2 + 50904^2 .

It is a super-2 number, since 2×20120977216² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157195071 + ... + 157195198.

Almost surely, 2^20120977216 is an apocalyptic number.

It is an amenable number.

20120977216 is a deficient number, since it is larger than the sum of its proper divisors (19806587074).

20120977216 is an equidigital number, since it uses as much as digits as its factorization.

20120977216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314390281 (or 314390271 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 20120977216 in words is "twenty billion, one hundred twenty million, nine hundred seventy-seven thousand, two hundred sixteen".