19551352890 has 32 divisors (see below), whose sum is σ = 47353743360. Its totient is φ = 5165861184.

The previous prime is 19551352859. The next prime is 19551352897. The reversal of 19551352890 is 9825315591.

It is a super-2 number, since 2×19551352890² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19551352897) 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, 2986234 + ... + 2992773.

It is an arithmetic number, because the mean of its divisors is an integer number (1479804480).

Almost surely, 2^19551352890 is an apocalyptic number.

19551352890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19551352890 is an abundant number, since it is smaller than the sum of its proper divisors (27802390470).

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

19551352890 is a wasteful number, since it uses less digits than its factorization.

19551352890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979126.

The product of its (nonzero) digits is 486000, while the sum is 48.

The spelling of 19551352890 in words is "nineteen billion, five hundred fifty-one million, three hundred fifty-two thousand, eight hundred ninety".