20454550136 has 8 divisors (see below), whose sum is σ = 38352281520. Its totient is φ = 10227275064.

The previous prime is 20454550121. The next prime is 20454550153. The reversal of 20454550136 is 63105545402.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20454550136² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20454550096 and 20454550105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278409376 + ... + 1278409391.

It is an arithmetic number, because the mean of its divisors is an integer number (4794035190).

Almost surely, 2^20454550136 is an apocalyptic number.

It is an amenable number.

20454550136 is a deficient number, since it is larger than the sum of its proper divisors (17897731384).

20454550136 is a wasteful number, since it uses less digits than its factorization.

20454550136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556818773 (or 2556818769 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 20454550136 in words is "twenty billion, four hundred fifty-four million, five hundred fifty thousand, one hundred thirty-six".