20438350151 has 2 divisors, whose sum is σ = 20438350152. Its totient is φ = 20438350150.

The previous prime is 20438350139. The next prime is 20438350169. The reversal of 20438350151 is 15105383402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20438350151 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20438320151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10219175075 + 10219175076.

It is an arithmetic number, because the mean of its divisors is an integer number (10219175076).

Almost surely, 2^20438350151 is an apocalyptic number.

20438350151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20438350151 is an equidigital number, since it uses as much as digits as its factorization.

20438350151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 20438350151 in words is "twenty billion, four hundred thirty-eight million, three hundred fifty thousand, one hundred fifty-one".