19291020001 has 24 divisors (see below), whose sum is σ = 21347064000. Its totient is φ = 17288251200.

The previous prime is 19291019999. The next prime is 19291020013. The reversal of 19291020001 is 10002019291.

It is not a de Polignac number, because 19291020001 - 2¹ = 19291019999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19291020901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71713695 + ... + 71713963.

It is an arithmetic number, because the mean of its divisors is an integer number (889461000).

Almost surely, 2^19291020001 is an apocalyptic number.

19291020001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19291020001 is a deficient number, since it is larger than the sum of its proper divisors (2056043999).

19291020001 is a wasteful number, since it uses less digits than its factorization.

19291020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 19291020001 its reverse (10002019291), we get a palindrome (29293039292).

The spelling of 19291020001 in words is "nineteen billion, two hundred ninety-one million, twenty thousand, one".