1820010100157 has 2 divisors, whose sum is σ = 1820010100158. Its totient is φ = 1820010100156.

The previous prime is 1820010100133. The next prime is 1820010100213. The reversal of 1820010100157 is 7510010100281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1675416995641 + 144593104516 = 1294379^2 + 380254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820010100157 - 2⁶ = 1820010100093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820010100057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910005050078 + 910005050079.

It is an arithmetic number, because the mean of its divisors is an integer number (910005050079).

Almost surely, 2^{1820010100157} is an apocalyptic number.

It is an amenable number.

1820010100157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820010100157 is an equidigital number, since it uses as much as digits as its factorization.

1820010100157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 26.

The spelling of 1820010100157 in words is "one trillion, eight hundred twenty billion, ten million, one hundred thousand, one hundred fifty-seven".