20715734432072 has 8 divisors (see below), whose sum is σ = 38842002060150. Its totient is φ = 10357867216032.

The previous prime is 20715734432051. The next prime is 20715734432083. The reversal of 20715734432072 is 27023443751702.

It can be written as a sum of positive squares in only one way, i.e., 11965414319236 + 8750320112836 = 3459106^2 + 2958094^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1294733401997 + ... + 1294733402012.

Almost surely, 2^{20715734432072} is an apocalyptic number.

It is an amenable number.

20715734432072 is a deficient number, since it is larger than the sum of its proper divisors (18126267628078).

20715734432072 is a wasteful number, since it uses less digits than its factorization.

20715734432072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589466804015 (or 2589466804011 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 47.

The spelling of 20715734432072 in words is "twenty trillion, seven hundred fifteen billion, seven hundred thirty-four million, four hundred thirty-two thousand, seventy-two".