2154511405020 has 96 divisors (see below), whose sum is σ = 6521960063808. Its totient is φ = 528277635072.

The previous prime is 2154511405003. The next prime is 2154511405037. The reversal of 2154511405020 is 205041154512.

It is an interprime number because it is at equal distance from previous prime (2154511405003) and next prime (2154511405037).

It is a super-2 number, since 2×2154511405020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5173459 + ... + 5574378.

It is an arithmetic number, because the mean of its divisors is an integer number (67937083998).

Almost surely, 2^{2154511405020} is an apocalyptic number.

2154511405020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154511405020 is an abundant number, since it is smaller than the sum of its proper divisors (4367448658788).

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

2154511405020 is a wasteful number, since it uses less digits than its factorization.

2154511405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10748119 (or 10748117 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 2154511405020 its reverse (205041154512), we get a palindrome (2359552559532).

The spelling of 2154511405020 in words is "two trillion, one hundred fifty-four billion, five hundred eleven million, four hundred five thousand, twenty".