20355470137 has 4 divisors (see below), whose sum is σ = 20369160576. Its totient is φ = 20341779700.

The previous prime is 20355470111. The next prime is 20355470153. The reversal of 20355470137 is 73107455302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20355470137 - 2²⁷ = 20221252409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20355470096 and 20355470105.

It is not an unprimeable number, because it can be changed into a prime (20355470167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6842989 + ... + 6845962.

It is an arithmetic number, because the mean of its divisors is an integer number (5092290144).

Almost surely, 2^20355470137 is an apocalyptic number.

It is an amenable number.

20355470137 is a deficient number, since it is larger than the sum of its proper divisors (13690439).

20355470137 is a wasteful number, since it uses less digits than its factorization.

20355470137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13690438.

The product of its (nonzero) digits is 88200, while the sum is 37.

The spelling of 20355470137 in words is "twenty billion, three hundred fifty-five million, four hundred seventy thousand, one hundred thirty-seven".