20379045145550 has 288 divisors, whose sum is σ = 49456092107520. Its totient is φ = 6100458624000.

The previous prime is 20379045145469. The next prime is 20379045145561. The reversal of 20379045145550 is 5554154097302.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 722621450 + ... + 722649650.

It is an arithmetic number, because the mean of its divisors is an integer number (171722542040).

Almost surely, 2^{20379045145550} is an apocalyptic number.

20379045145550 is an abundant number, since it is smaller than the sum of its proper divisors (29077046961970).

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

20379045145550 is a wasteful number, since it uses less digits than its factorization.

20379045145550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28908 (or 28890 counting only the distinct ones).

The product of its (nonzero) digits is 3780000, while the sum is 50.

The spelling of 20379045145550 in words is "twenty trillion, three hundred seventy-nine billion, forty-five million, one hundred forty-five thousand, five hundred fifty".