20529049191 has 8 divisors (see below), whose sum is σ = 31282360704. Its totient is φ = 11730885240.

The previous prime is 20529049147. The next prime is 20529049201. The reversal of 20529049191 is 19194092502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20529049191 - 2⁷ = 20529049063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20529049391) 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, 488786865 + ... + 488786906.

It is an arithmetic number, because the mean of its divisors is an integer number (3910295088).

Almost surely, 2^20529049191 is an apocalyptic number.

20529049191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20529049191 is a deficient number, since it is larger than the sum of its proper divisors (10753311513).

20529049191 is an equidigital number, since it uses as much as digits as its factorization.

20529049191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977573781.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 20529049191 in words is "twenty billion, five hundred twenty-nine million, forty-nine thousand, one hundred ninety-one".