20357506355 has 4 divisors (see below), whose sum is σ = 24429007632. Its totient is φ = 16286005080.

The previous prime is 20357506349. The next prime is 20357506361. The reversal of 20357506355 is 55360575302.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20357506349) and next prime (20357506361).

It is not a de Polignac number, because 20357506355 - 2¹⁸ = 20357244211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035750631 + ... + 2035750640.

It is an arithmetic number, because the mean of its divisors is an integer number (6107251908).

Almost surely, 2^20357506355 is an apocalyptic number.

20357506355 is a deficient number, since it is larger than the sum of its proper divisors (4071501277).

20357506355 is an equidigital number, since it uses as much as digits as its factorization.

20357506355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071501276.

The product of its (nonzero) digits is 472500, while the sum is 41.

The spelling of 20357506355 in words is "twenty billion, three hundred fifty-seven million, five hundred six thousand, three hundred fifty-five".