16719701220 has 36 divisors (see below), whose sum is σ = 50716427580. Its totient is φ = 4458586944.

The previous prime is 16719701203. The next prime is 16719701221. The reversal of 16719701220 is 2210791761.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12083725476 + 4635975744 = 109926^2 + 68088^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (16719701221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46443435 + ... + 46443794.

It is an arithmetic number, because the mean of its divisors is an integer number (1408789655).

Almost surely, 2^16719701220 is an apocalyptic number.

16719701220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16719701220 is an abundant number, since it is smaller than the sum of its proper divisors (33996726360).

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

16719701220 is a wasteful number, since it uses less digits than its factorization.

16719701220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92887244 (or 92887239 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

It can be divided in two parts, 16719701 and 220, that added together give a square (16719921 = 4089²).

The spelling of 16719701220 in words is "sixteen billion, seven hundred nineteen million, seven hundred one thousand, two hundred twenty".