20453696149 has 16 divisors (see below), whose sum is σ = 21993311808. Its totient is φ = 18951812352.

The previous prime is 20453696147. The next prime is 20453696167. The reversal of 20453696149 is 94169635402.

It is a cyclic number.

It is not a de Polignac number, because 20453696149 - 2¹ = 20453696147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453696147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2333994 + ... + 2342740.

It is an arithmetic number, because the mean of its divisors is an integer number (1374581988).

Almost surely, 2^20453696149 is an apocalyptic number.

It is an amenable number.

20453696149 is a deficient number, since it is larger than the sum of its proper divisors (1539615659).

20453696149 is a wasteful number, since it uses less digits than its factorization.

20453696149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10884.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 20453696149 in words is "twenty billion, four hundred fifty-three million, six hundred ninety-six thousand, one hundred forty-nine".