20072465521 has 2 divisors, whose sum is σ = 20072465522. Its totient is φ = 20072465520.

The previous prime is 20072465473. The next prime is 20072465531. The reversal of 20072465521 is 12556427002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17831863296 + 2240602225 = 133536^2 + 47335^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072465521 - 2¹¹ = 20072463473 is a prime.

It is not a weakly prime, because it can be changed into another prime (20072465531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036232760 + 10036232761.

It is an arithmetic number, because the mean of its divisors is an integer number (10036232761).

Almost surely, 2^20072465521 is an apocalyptic number.

It is an amenable number.

20072465521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072465521 is an equidigital number, since it uses as much as digits as its factorization.

20072465521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 20072465521 in words is "twenty billion, seventy-two million, four hundred sixty-five thousand, five hundred twenty-one".