34020721980 has 192 divisors, whose sum is σ = 128078254080. Its totient is φ = 7318729728.

The previous prime is 34020721919. The next prime is 34020721991. The reversal of 34020721980 is 8912702043.

34020721980 is a `hidden beast` number, since 340 + 20 + 7 + 219 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200452 + ... + 328971.

It is an arithmetic number, because the mean of its divisors is an integer number (667074240).

Almost surely, 2^34020721980 is an apocalyptic number.

34020721980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

34020721980 is an abundant number, since it is smaller than the sum of its proper divisors (94057532100).

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

34020721980 is a wasteful number, since it uses less digits than its factorization.

34020721980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529465 (or 529457 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 34020721980 in words is "thirty-four billion, twenty million, seven hundred twenty-one thousand, nine hundred eighty".