10400020155 has 24 divisors (see below), whose sum is σ = 20601945312. Its totient is φ = 4754294784.

The previous prime is 10400020153. The next prime is 10400020159. The reversal of 10400020155 is 55102000401.

10400020155 is a `hidden beast` number, since 10 + 400 + 0 + 201 + 55 = 666.

It is not a de Polignac number, because 10400020155 - 2¹ = 10400020153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10400020153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16507654 + ... + 16508283.

It is an arithmetic number, because the mean of its divisors is an integer number (858414388).

Almost surely, 2^10400020155 is an apocalyptic number.

10400020155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10400020155 is a deficient number, since it is larger than the sum of its proper divisors (10201925157).

10400020155 is a wasteful number, since it uses less digits than its factorization.

10400020155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33015955 (or 33015952 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

Adding to 10400020155 its reverse (55102000401), we get a palindrome (65502020556).

The spelling of 10400020155 in words is "ten billion, four hundred million, twenty thousand, one hundred fifty-five".