20503153400 has 24 divisors (see below), whose sum is σ = 47669832120. Its totient is φ = 8201261280.

The previous prime is 20503153393. The next prime is 20503153421. The reversal of 20503153400 is 435130502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51257684 + ... + 51258083.

It is an arithmetic number, because the mean of its divisors is an integer number (1986243005).

Almost surely, 2^20503153400 is an apocalyptic number.

20503153400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20503153400 is an abundant number, since it is smaller than the sum of its proper divisors (27166678720).

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

20503153400 is a wasteful number, since it uses less digits than its factorization.

20503153400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102515783 (or 102515774 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 20503153400 its reverse (435130502), we get a palindrome (20938283902).

The spelling of 20503153400 in words is "twenty billion, five hundred three million, one hundred fifty-three thousand, four hundred".