20434562357 has 8 divisors (see below), whose sum is σ = 22404273600. Its totient is φ = 18483521760.

The previous prime is 20434562321. The next prime is 20434562363. The reversal of 20434562357 is 75326543402.

It is a happy number.

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

It is not a de Polignac number, because 20434562357 - 2⁸ = 20434562101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20439562357) 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, 4665368 + ... + 4669745.

It is an arithmetic number, because the mean of its divisors is an integer number (2800534200).

Almost surely, 2^20434562357 is an apocalyptic number.

It is an amenable number.

20434562357 is a deficient number, since it is larger than the sum of its proper divisors (1969711243).

20434562357 is a wasteful number, since it uses less digits than its factorization.

20434562357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9335323.

The product of its (nonzero) digits is 604800, while the sum is 41.

The spelling of 20434562357 in words is "twenty billion, four hundred thirty-four million, five hundred sixty-two thousand, three hundred fifty-seven".