20402632469 has 2 divisors, whose sum is σ = 20402632470. Its totient is φ = 20402632468.

The previous prime is 20402632451. The next prime is 20402632489. The reversal of 20402632469 is 96423620402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18813414244 + 1589218225 = 137162^2 + 39865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402632469 - 2²⁰ = 20401583893 is a prime.

It is a super-2 number, since 2×20402632469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402632489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201316234 + 10201316235.

It is an arithmetic number, because the mean of its divisors is an integer number (10201316235).

Almost surely, 2^20402632469 is an apocalyptic number.

It is an amenable number.

20402632469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402632469 is an equidigital number, since it uses as much as digits as its factorization.

20402632469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 20402632469 in words is "twenty billion, four hundred two million, six hundred thirty-two thousand, four hundred sixty-nine".