20356435550 has 48 divisors (see below), whose sum is σ = 42183942912. Its totient is φ = 7244834400.

The previous prime is 20356435459. The next prime is 20356435553. The reversal of 20356435550 is 5553465302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356435553) 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, 367892 + ... + 419591.

It is an arithmetic number, because the mean of its divisors is an integer number (878832144).

Almost surely, 2^20356435550 is an apocalyptic number.

20356435550 is an abundant number, since it is smaller than the sum of its proper divisors (21827507362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20356435550 is a wasteful number, since it uses less digits than its factorization.

20356435550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787553 (or 787548 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 38.

The spelling of 20356435550 in words is "twenty billion, three hundred fifty-six million, four hundred thirty-five thousand, five hundred fifty".