19913007 has 16 divisors (see below), whose sum is σ = 28546560. Its totient is φ = 12307392.

The previous prime is 19912987. The next prime is 19913011. The reversal of 19913007 is 70031991.

It is not a de Polignac number, because 19913007 - 2¹⁵ = 19880239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19913017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1038 + ... + 6395.

It is an arithmetic number, because the mean of its divisors is an integer number (1784160).

Almost surely, 2^19913007 is an apocalyptic number.

19913007 is a deficient number, since it is larger than the sum of its proper divisors (8633553).

19913007 is a wasteful number, since it uses less digits than its factorization.

19913007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7502.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 19913007 is about 4462.3992425600. The cubic root of 19913007 is about 271.0476307759.

Adding to 19913007 its reverse (70031991), we get a palindrome (89944998).

The spelling of 19913007 in words is "nineteen million, nine hundred thirteen thousand, seven".