19490642999290 has 16 divisors (see below), whose sum is σ = 35100939064968. Its totient is φ = 7792305718336.

The previous prime is 19490642999263. The next prime is 19490642999293. The reversal of 19490642999290 is 9299924609491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5931596927169 + 13559046072121 = 2435487^2 + 3682261^2 .

It is not an unprimeable number, because it can be changed into a prime (19490642999293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493914457 + ... + 493953916.

Almost surely, 2^{19490642999290} is an apocalyptic number.

19490642999290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19490642999290 is a deficient number, since it is larger than the sum of its proper divisors (15610296065678).

19490642999290 is a wasteful number, since it uses less digits than its factorization.

19490642999290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987870353.

The product of its (nonzero) digits is 204073344, while the sum is 73.

The spelling of 19490642999290 in words is "nineteen trillion, four hundred ninety billion, six hundred forty-two million, nine hundred ninety-nine thousand, two hundred ninety".