20558272951 has 2 divisors, whose sum is σ = 20558272952. Its totient is φ = 20558272950.

The previous prime is 20558272939. The next prime is 20558272997. The reversal of 20558272951 is 15927285502.

It is an a-pointer prime, because the next prime (20558272997) can be obtained adding 20558272951 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20558272951 - 2¹¹ = 20558270903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20558270951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10279136475 + 10279136476.

It is an arithmetic number, because the mean of its divisors is an integer number (10279136476).

Almost surely, 2^20558272951 is an apocalyptic number.

20558272951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20558272951 is an equidigital number, since it uses as much as digits as its factorization.

20558272951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 20558272951 in words is "twenty billion, five hundred fifty-eight million, two hundred seventy-two thousand, nine hundred fifty-one".