20136400226 has 16 divisors (see below), whose sum is σ = 31613087808. Its totient is φ = 9601350000.

The previous prime is 20136400213. The next prime is 20136400237. The reversal of 20136400226 is 62200463102.

It is a super-2 number, since 2×20136400226² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20136400195 and 20136400204.

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, 646025 + ... + 676476.

It is an arithmetic number, because the mean of its divisors is an integer number (1975817988).

Almost surely, 2^20136400226 is an apocalyptic number.

20136400226 is a deficient number, since it is larger than the sum of its proper divisors (11476687582).

20136400226 is a wasteful number, since it uses less digits than its factorization.

20136400226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322857.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 20136400226 its reverse (62200463102), we get a palindrome (82336863328).

The spelling of 20136400226 in words is "twenty billion, one hundred thirty-six million, four hundred thousand, two hundred twenty-six".