20356435551 has 8 divisors (see below), whose sum is σ = 27142700544. Its totient is φ = 13570563800.

The previous prime is 20356435459. The next prime is 20356435553. The reversal of 20356435551 is 15553465302.

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

It is a cyclic number.

It is not a de Polignac number, because 20356435551 - 2²⁷ = 20222217823 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 57970 + ... + 209936.

It is an arithmetic number, because the mean of its divisors is an integer number (3392837568).

Almost surely, 2^20356435551 is an apocalyptic number.

20356435551 is a deficient number, since it is larger than the sum of its proper divisors (6786264993).

20356435551 is a wasteful number, since it uses less digits than its factorization.

20356435551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196621.

The product of its (nonzero) digits is 270000, while the sum is 39.

The spelling of 20356435551 in words is "twenty billion, three hundred fifty-six million, four hundred thirty-five thousand, five hundred fifty-one".