20351555452 has 24 divisors (see below), whose sum is σ = 35889638400. Its totient is φ = 10097447856.

The previous prime is 20351555431. The next prime is 20351555461. The reversal of 20351555452 is 25455515302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1238949 + ... + 1255267.

It is an arithmetic number, because the mean of its divisors is an integer number (1495401600).

Almost surely, 2^20351555452 is an apocalyptic number.

It is an amenable number.

20351555452 is a deficient number, since it is larger than the sum of its proper divisors (15538082948).

20351555452 is a wasteful number, since it uses less digits than its factorization.

20351555452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18705 (or 18703 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 20351555452 in words is "twenty billion, three hundred fifty-one million, five hundred fifty-five thousand, four hundred fifty-two".