20400155034 has 32 divisors (see below), whose sum is σ = 46996094976. Its totient is φ = 5782719600.

The previous prime is 20400154993. The next prime is 20400155047. The reversal of 20400155034 is 43055100402.

It is a super-2 number, since 2×20400155034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20400154995 and 20400155013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1906942 + ... + 1917609.

It is an arithmetic number, because the mean of its divisors is an integer number (1468627968).

Almost surely, 2^20400155034 is an apocalyptic number.

20400155034 is an abundant number, since it is smaller than the sum of its proper divisors (26595939942).

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

20400155034 is a wasteful number, since it uses less digits than its factorization.

20400155034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824690.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20400155034 its reverse (43055100402), we get a palindrome (63455255436).

The spelling of 20400155034 in words is "twenty billion, four hundred million, one hundred fifty-five thousand, thirty-four".