20487454331 has 2 divisors, whose sum is σ = 20487454332. Its totient is φ = 20487454330.

The previous prime is 20487454291. The next prime is 20487454343. The reversal of 20487454331 is 13345478402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20487454331 - 2³⁴ = 3307585147 is a prime.

It is a super-2 number, since 2×20487454331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20487454531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10243727165 + 10243727166.

It is an arithmetic number, because the mean of its divisors is an integer number (10243727166).

Almost surely, 2^20487454331 is an apocalyptic number.

20487454331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20487454331 is an equidigital number, since it uses as much as digits as its factorization.

20487454331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 20487454331 in words is "twenty billion, four hundred eighty-seven million, four hundred fifty-four thousand, three hundred thirty-one".