15420040090 has 32 divisors (see below), whose sum is σ = 34161321600. Its totient is φ = 4880188224.

The previous prime is 15420040087. The next prime is 15420040093. The reversal of 15420040090 is 9004002451.

It is an interprime number because it is at equal distance from previous prime (15420040087) and next prime (15420040093).

It is not an unprimeable number, because it can be changed into a prime (15420040093) 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, 8471640 + ... + 8473459.

It is an arithmetic number, because the mean of its divisors is an integer number (1067541300).

Almost surely, 2^15420040090 is an apocalyptic number.

15420040090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15420040090 is an abundant number, since it is smaller than the sum of its proper divisors (18741281510).

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

15420040090 is a wasteful number, since it uses less digits than its factorization.

15420040090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16945126.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 15420040090 in words is "fifteen billion, four hundred twenty million, forty thousand, ninety".