20236511055640 has 32 divisors (see below), whose sum is σ = 49671436228560. Its totient is φ = 7358731292800.

The previous prime is 20236511055601. The next prime is 20236511055659. The reversal of 20236511055640 is 4655011563202.

It is a super-3 number, since 3×20236511055640³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 20236511055593 and 20236511055602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22996034851 + ... + 22996035730.

Almost surely, 2^{20236511055640} is an apocalyptic number.

20236511055640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20236511055640 is an abundant number, since it is smaller than the sum of its proper divisors (29434925172920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20236511055640 is a wasteful number, since it uses less digits than its factorization.

20236511055640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45992070603 (or 45992070599 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 20236511055640 in words is "twenty trillion, two hundred thirty-six billion, five hundred eleven million, fifty-five thousand, six hundred forty".