19949051 has 2 divisors, whose sum is σ = 19949052. Its totient is φ = 19949050.

The previous prime is 19949047. The next prime is 19949057. The reversal of 19949051 is 15094991.

It is a weak prime.

It is an emirp because it is prime and its reverse (15094991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19949051 - 2² = 19949047 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19948996 and 19949014.

It is not a weakly prime, because it can be changed into another prime (19949057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9974525 + 9974526.

It is an arithmetic number, because the mean of its divisors is an integer number (9974526).

Almost surely, 2^19949051 is an apocalyptic number.

19949051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19949051 is an equidigital number, since it uses as much as digits as its factorization.

19949051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 19949051 is about 4466.4360512606. The cubic root of 19949051 is about 271.2110708855.

The spelling of 19949051 in words is "nineteen million, nine hundred forty-nine thousand, fifty-one".