20434325537 has 2 divisors, whose sum is σ = 20434325538. Its totient is φ = 20434325536.

The previous prime is 20434325411. The next prime is 20434325563. The reversal of 20434325537 is 73552343402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20051692816 + 382632721 = 141604^2 + 19561^2 .

It is a cyclic number.

It is not a de Polignac number, because 20434325537 - 2¹² = 20434321441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20434325537.

It is not a weakly prime, because it can be changed into another prime (20434325237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217162768 + 10217162769.

It is an arithmetic number, because the mean of its divisors is an integer number (10217162769).

Almost surely, 2^20434325537 is an apocalyptic number.

It is an amenable number.

20434325537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434325537 is an equidigital number, since it uses as much as digits as its factorization.

20434325537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 38.

Adding to 20434325537 its reverse (73552343402), we get a palindrome (93986668939).

The spelling of 20434325537 in words is "twenty billion, four hundred thirty-four million, three hundred twenty-five thousand, five hundred thirty-seven".