20597351061 has 8 divisors (see below), whose sum is σ = 31386439744. Its totient is φ = 11769914880.

The previous prime is 20597351057. The next prime is 20597351063. The reversal of 20597351061 is 16015379502.

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

It is not a de Polignac number, because 20597351061 - 2² = 20597351057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20597351063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490413100 + ... + 490413141.

It is an arithmetic number, because the mean of its divisors is an integer number (3923304968).

Almost surely, 2^20597351061 is an apocalyptic number.

20597351061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20597351061 is a deficient number, since it is larger than the sum of its proper divisors (10789088683).

20597351061 is an equidigital number, since it uses as much as digits as its factorization.

20597351061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980826251.

The product of its (nonzero) digits is 56700, while the sum is 39.

The spelling of 20597351061 in words is "twenty billion, five hundred ninety-seven million, three hundred fifty-one thousand, sixty-one".