20357671451 has 4 divisors (see below), whose sum is σ = 21923646192. Its totient is φ = 18791696712.

The previous prime is 20357671447. The next prime is 20357671483. The reversal of 20357671451 is 15417675302.

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

It is a cyclic number.

It is not a de Polignac number, because 20357671451 - 2² = 20357671447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20357671399 and 20357671408.

It is not an unprimeable number, because it can be changed into a prime (20357671051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782987351 + ... + 782987376.

It is an arithmetic number, because the mean of its divisors is an integer number (5480911548).

Almost surely, 2^20357671451 is an apocalyptic number.

20357671451 is a deficient number, since it is larger than the sum of its proper divisors (1565974741).

20357671451 is a wasteful number, since it uses less digits than its factorization.

20357671451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565974740.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 20357671451 in words is "twenty billion, three hundred fifty-seven million, six hundred seventy-one thousand, four hundred fifty-one".