20575207551 has 8 divisors (see below), whose sum is σ = 27447522480. Its totient is φ = 13709848832.

The previous prime is 20575207547. The next prime is 20575207663. The reversal of 20575207551 is 15570257502.

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 20575207551 - 2² = 20575207547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20575207351) 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, 1732146 + ... + 1743983.

It is an arithmetic number, because the mean of its divisors is an integer number (3430940310).

Almost surely, 2^20575207551 is an apocalyptic number.

20575207551 is a deficient number, since it is larger than the sum of its proper divisors (6872314929).

20575207551 is a wasteful number, since it uses less digits than its factorization.

20575207551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478105.

The product of its (nonzero) digits is 122500, while the sum is 39.

The spelling of 20575207551 in words is "twenty billion, five hundred seventy-five million, two hundred seven thousand, five hundred fifty-one".