18400654091 has 2 divisors, whose sum is σ = 18400654092. Its totient is φ = 18400654090.

The previous prime is 18400654079. The next prime is 18400654093. The reversal of 18400654091 is 19045600481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18400654091 - 2¹⁰ = 18400653067 is a prime.

Together with 18400654093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18400654093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9200327045 + 9200327046.

It is an arithmetic number, because the mean of its divisors is an integer number (9200327046).

Almost surely, 2^18400654091 is an apocalyptic number.

18400654091 is a deficient number, since it is larger than the sum of its proper divisors (1).

18400654091 is an equidigital number, since it uses as much as digits as its factorization.

18400654091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 18400654091 in words is "eighteen billion, four hundred million, six hundred fifty-four thousand, ninety-one".