23491356780 has 48 divisors (see below), whose sum is σ = 66702230784. Its totient is φ = 6176130240.

The previous prime is 23491356767. The next prime is 23491356787. The reversal of 23491356780 is 8765319432.

It is not an unprimeable number, because it can be changed into a prime (23491356787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2752942 + ... + 2761461.

It is an arithmetic number, because the mean of its divisors is an integer number (1389629808).

It is a 2-persistent number, because it is pandigital, and so is 2⋅23491356780 = 46982713560, but 3⋅23491356780 = 70474070340 is not.

Almost surely, 2^23491356780 is an apocalyptic number.

23491356780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23491356780 is an abundant number, since it is smaller than the sum of its proper divisors (43210874004).

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

23491356780 is a wasteful number, since it uses less digits than its factorization.

23491356780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514486 (or 5514484 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 23491356780 in words is "twenty-three billion, four hundred ninety-one million, three hundred fifty-six thousand, seven hundred eighty".