20151514732420 has 24 divisors (see below), whose sum is σ = 42318349737048. Its totient is φ = 8060573740800.

The previous prime is 20151514732397. The next prime is 20151514732421. The reversal of 20151514732420 is 2423741515102.

It can be written as a sum of positive squares in 4 ways, for example, as 5392640706436 + 14758874025984 = 2322206^2 + 3841728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20151514732420.

It is not an unprimeable number, because it can be changed into a prime (20151514732421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3498040 + ... + 7248400.

It is an arithmetic number, because the mean of its divisors is an integer number (1763264572377).

Almost surely, 2^{20151514732420} is an apocalyptic number.

20151514732420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20151514732420 is an abundant number, since it is smaller than the sum of its proper divisors (22166835004628).

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

20151514732420 is a wasteful number, since it uses less digits than its factorization.

20151514732420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019031 (or 4019029 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 20151514732420 in words is "twenty trillion, one hundred fifty-one billion, five hundred fourteen million, seven hundred thirty-two thousand, four hundred twenty".