20069986537 has 2 divisors, whose sum is σ = 20069986538. Its totient is φ = 20069986536.

The previous prime is 20069986493. The next prime is 20069986549. The reversal of 20069986537 is 73568996002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13610488896 + 6459497641 = 116664^2 + 80371^2 .

It is a cyclic number.

It is not a de Polignac number, because 20069986537 - 2²³ = 20061597929 is a prime.

It is a super-2 number, since 2×20069986537² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20069986567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10034993268 + 10034993269.

It is an arithmetic number, because the mean of its divisors is an integer number (10034993269).

Almost surely, 2^20069986537 is an apocalyptic number.

It is an amenable number.

20069986537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20069986537 is an equidigital number, since it uses as much as digits as its factorization.

20069986537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 20069986537 in words is "twenty billion, sixty-nine million, nine hundred eighty-six thousand, five hundred thirty-seven".